lefty7283 17 hours ago • 100%
What focal length do you normally shoot at? My rig is at 610mm and I get satellite trails mostly around dusk/dawn, but they all get rejected out during stacking
lefty7283 18 hours ago • 100%
Guess I’ll be sticking with mine for a little bit longer. Was really hoping for pancake lenses in this
lefty7283 5 days ago • 100%
Some nice colors in the sky If you’re north enough. Sadly I doubt this will be as strong as the aurora back in May, but maybe one day well get them down in Atlanta again
lefty7283 2 weeks ago • 100%
NGC 4490 is a galaxy colliding with the smaller NGC 4485 galaxy, and both are about 25 million light years away. This image was taken with a monochrome camera through filters for luminance (all visible light), red, green, blue, and Hydrogen-alpha (656nm), which were combined into a color image. The Hydrogen-alpha was combined with red (described below) to make the HaLRGB image. The pink Ha regions are star forming nebulae within the galaxies. This got cropped out of the final pic, but I ended getting some gorgeous diffraction spikes on this star near the edge of the full FOV
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-120MC for guiding
-
Moonlite Autofocuser
Acquisition: 27 hours 37 minutes (Camera at half Unity Gain, -15°C)
-
Ha - 128x360"
-
Lum - 464x60"
-
Red - 152x60"
-
Green - 150x60"
-
Blue - 123x60"
-
Flats- 30 per filter
-
24 JimmyFlats per broadband filter
Capture Software:
- Captured using N.I.N.A.
PixInsight Processing:
-
BatchPreProcessing (with premade JimmyFlats)
-
StarAlignment
-
ImageIntegration
-
DrizzleIntegration (2x, Var β=1.5)
-
DynamicCrop
-
DynamicBackgroundExtraction
duplicated each image and removed stars via StarXterminator. Ran DBE to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)
$T * med(model) / model
Luminance:
-
BlurXTerminator
-
ArcsinhStretch + histogramtransformation to bring nonlinear
RGB:
-
ChannelCombinaiton to combine monochrome R, G, B stacks into color image
-
SpectroPhotometricColorCalibration
-
BlurXTerminator (correct only mode)
-
HSV Repair
making clean Ha
loosely following this guide
This basically subtracts any broadband signal from the Ha pic, leaving only the Ha emission, which is then combined in with the red and a little bit of the blue channels
- PixelMath to isolate just Ha
Ha-Q * (Red-med (Red)), Q=0.75
- PixelMath to add Ha into RGB image
Red = $T+B*(Ha_Clean - med(Ha_Clean))
Green = $T
Blue = $T+B0.2(Ha_Clean - med(Ha_Clean))
B variable = 0.6 (this controls how strongly the Ha is added)
Nonlinear
-
ArcsinhStretch + histogramtransformation to bring HaRGB image nonlinear
-
MLT for large scale chrominance noise reduction
-
shitloads of curve transformations to adjust lightness, contrast, saturation, etc (with various luminance and star masks)
-
slight SCNR to remove some greens
-
LRGBCombination with stretched Luminance
-
DeepSNR
-
more curves
-
ColorSaturation to slightly desaturate the Ha regions (they were very pink compared to the rest of the galaxy
-
slight noisexterminator
-
LocalHistogramEqualization
-
even more curves
-
Resample to 75%
-
DynamicCrop onto just the galaxy
-
annotation
lefty7283 2 weeks ago • 100%
NGC 4490 is a galaxy colliding with the smaller NGC 4485 galaxy, and both are about 25 million light years away. This image was taken with a monochrome camera through filters for luminance (all visible light), red, green, blue, and Hydrogen-alpha (656nm), which were combined into a color image. The Hydrogen-alpha was combined with red (described below) to make the HaLRGB image. The pink Ha regions are star forming nebulae within the galaxies. This got cropped out of the final pic, but I ended getting some gorgeous diffraction spikes on this star near the edge of the full FOV
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-120MC for guiding
-
Moonlite Autofocuser
Acquisition: 27 hours 37 minutes (Camera at half Unity Gain, -15°C)
-
Ha - 128x360"
-
Lum - 464x60"
-
Red - 152x60"
-
Green - 150x60"
-
Blue - 123x60"
-
Flats- 30 per filter
-
24 JimmyFlats per broadband filter
Capture Software:
- Captured using N.I.N.A.
PixInsight Processing:
-
BatchPreProcessing (with premade JimmyFlats)
-
StarAlignment
-
ImageIntegration
-
DrizzleIntegration (2x, Var β=1.5)
-
DynamicCrop
-
DynamicBackgroundExtraction
duplicated each image and removed stars via StarXterminator. Ran DBE to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)
$T * med(model) / model
Luminance:
-
BlurXTerminator
-
ArcsinhStretch + histogramtransformation to bring nonlinear
RGB:
-
ChannelCombinaiton to combine monochrome R, G, B stacks into color image
-
SpectroPhotometricColorCalibration
-
BlurXTerminator (correct only mode)
-
HSV Repair
making clean Ha
loosely following this guide
This basically subtracts any broadband signal from the Ha pic, leaving only the Ha emission, which is then combined in with the red and a little bit of the blue channels
- PixelMath to isolate just Ha
Ha-Q * (Red-med (Red)), Q=0.75
- PixelMath to add Ha into RGB image
Red = $T+B*(Ha_Clean - med(Ha_Clean))
Green = $T
Blue = $T+B0.2(Ha_Clean - med(Ha_Clean))
B variable = 0.6 (this controls how strongly the Ha is added)
Nonlinear
-
ArcsinhStretch + histogramtransformation to bring HaRGB image nonlinear
-
MLT for large scale chrominance noise reduction
-
shitloads of curve transformations to adjust lightness, contrast, saturation, etc (with various luminance and star masks)
-
slight SCNR to remove some greens
-
LRGBCombination with stretched Luminance
-
DeepSNR
-
more curves
-
ColorSaturation to slightly desaturate the Ha regions (they were very pink compared to the rest of the galaxy
-
slight noisexterminator
-
LocalHistogramEqualization
-
even more curves
-
Resample to 75%
-
DynamicCrop onto just the galaxy
-
annotation
lefty7283 2 weeks ago • 100%
It’s an artifact from the camera. The ASI1600 has microlenses over each pixel on the sensor, which makes this pattern around bright stars
lefty7283 2 weeks ago • 100%
The Horsehead Nebula is a dark nebula about 1400ly away from us in the constellation Orion. The Bright star near it is Alnitak, and it one of the stars that makes up Orion's Belt. Because this is one of the brightest stars that people photograph when shooting DSOs, it often can result in unwanted halos, which are present in my RGB filters. I was able to edit the halos out to a level I felt was acceptable (see processing info below), however there still is some color fringing/artifacts on the edge of the halos. Also the bottom left of Alnitak is the Flame Nebula, which is just a nebula that happens to be in the foreground to the horsehead. Captured over 5 nights from February 14-20, 2022 from my Bortle 6 driveway.
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-120mc for guiding
-
Moonlite Autofocuser
Acquisition: 12 hours 6 minutes (Camera at Unity Gain, -20°C)
-
Lum- 251x60"
-
Ha- 67x300"
-
Red- 33x90"
-
Green- 31x60"
-
Blue- 29x60"
-
Darks- 30
-
Flats- 30 per filter
Capture Software:
- Captured using N.I.N.A. and PHD2 for guiding and dithering.
PixInsight Processing:
-
BatchPreProcessing
-
SubframeSelector
-
StarAlignment
-
ImageIntegration
-
DrizzleIntegration (2x, Var β=1.5)
Linear:
-
DynamicCrop
-
Automatic and Dynamic Background extractions
RGB:
-
ChannelCombination to map monochrome R, G, and B images into a color image
-
PhotometricColorCalibration
-
Slight SCNR green
-
HSV repair
-
ArcsinhStretch + HistogramTransformation to bring nonlinear
Luminance:
- PixelMath to combine Ha and luminance stacks to make super-luminance image (to be used as the luminance layer going forward)
0.7*Ha + 0.3*Lum
-
EZ Decon
-
NoiseXTerminator
-
ArcsinhStretch + HistogramTransformation to bring nonlinear
Nonlinear:
-
Created two circle masks per this guide. SCNR + curve tweaks to mitigate the halos from my RGB filters
-
LRGBCombination with SuperLum
-
Ungodly amounts of curve transformations to further mitigate the halos, as well as just general curves for lightness, saturation, contrast, hues, etc.
-
ColorSaturation
-
Extract L > LRGBCombination for chrominance noise reduction
-
LocalHistogramEqualization
-
EZ Star reduction
-
NoiseGenerator to add noise into reduced star areas
-
another round of LHE
-
more curves
-
CloneStamp to remove a couple of weirdly artifacted stars
-
even more curves
-
Resample to 60%
-
Annotation
lefty7283 2 weeks ago • 100%
I guess my astrophotography hobby has cancelled out my drinking and porn hobbies lol
lefty7283 2 weeks ago • 100%
If you're going into deep sky imaging, getting a solid tracking mount will be more important than a specific camera/lens. I'll be honest I haven't really bought new gear or looked at new equipment in the last few years, but this vid from Alaskan Astro is a great overview and recommendations for beginner setup (I see the 135mm f/2 has already been recommended in here lol). It's also worth checking out used equipment if you're on a budget. I've found some great deals on the cloudynights classifieds, craigslist, and FB marketplace when I was assembling my rig.
Also since you want to use your camera for astro and normal photography, you can still use a H-alpha modded camera, but just use a custom white balance for non-astro shots. Personally I wouldn't worry too much about getting a modded cam if you're just starting out in the hobby, but it's something you may want to consider if you want to shoot a lot of emission nebulae
Hopefully it'll be visible to us on the ground! https://heavens-above.com/PassSummary.aspx?satid=59588
lefty7283 3 weeks ago • 100%
Iirc the original goal was ‘at least 10’ but maybe up to 100 flights for a booster. No way to really know without flying them a lot
lefty7283 3 weeks ago • 100%
It’s definitely real, at least for the amateur astronomy subs I (used to) mod. I suspect a lot of the traffic to askastrophotography or telescopes is from people googling stuff and browsing though mobile web, but since /r/astrophotography is just photos, most are just on the app
lefty7283 3 weeks ago • 100%
Probably varies a bit from sub to sub, but old reddit users are a clear minority. The vast majority use the app
lefty7283 4 weeks ago • 100%
Mildew is trying to sleep in today
lefty7283 4 weeks ago • 100%
NASA is still doing a seat exchange and launching Johnny Kim on the next Soyuz in March, but it looks like it’ll be just Russians on at least the next 2 Soyuz’s after that
lefty7283 1 month ago • 100%
with my luck it's gonna pop in november just after it sinks behind some trees for the season
lefty7283 1 month ago • 100%
I made this comparison a while ago, and figured I'd share it since I've seen some headlines going around the last couple days...
The Moon's orbit isn't a perfect circle, and at times is a little closer and a little farther away from Earth. It's called a supermoon when the moon is full and at its closest point, and a micromoon when its full and at its furthest point
I wanted to make this comparison to highlight that the supermoon isn't really that much larger than normal. Personally I think the supermoon is overhyped for what it is, and that it's hard to tell visually that the moon is larger or smaller, unless you do a direct comparison like this. The moon can appear larger than normal when its close to the horizon, but the actual size of it is no different than if it was straight overhead: https://en.wikipedia.org/wiki/Moon_illusion
The angular diameters and distances were taken from a planetarium program called Stellarium. I compared the pixel measurements of my photos to the values calculated by Stellarium, and the discrepancy was only 0.22%.
-
TPO 6" F/4 Imaging Newtonian
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Moonlite Autofocuser
Acquisition: (Camera at Unity Gain, -20°C for supermoon, -10°C for micromoon)
-
Astronomik Red filter used to combat atmospheric seeing
-
Exposure- 0.213ms for supermoon, 1.115ms for micromoon
-
1000 frame capture for supermoon
-
2000 frame capture for micromoon
Capture Software:
- Captured using Sharpcap and N.I.N.A. for filterwheel and focuser control
Processing:
-
Supermoon: Best 10% of frames stacked in Autostakkert!3
-
Micromoon: Best 25% of frames stacked
-
Registax Wavelets for sharpening on both images
-
Level and curve adjustments in Photoshop
-
Images combined and annotated in Photoshop
lefty7283 1 month ago • 100%
It may not be as big or well known as the other well known cluster in Hercules (M13), but it sure looks nice. Captured over 4 nights in July/August 2024 from a Bortle 9 zone
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-120MC for guiding
-
Moonlite Autofocuser
Acquisition: 6 hours 55 minutes (Camera at half Unity Gain, -15°C)
-
Lum - 209x60"
-
Red - 78x60"
-
Green - 62x60"
-
Blue - 66x60"
-
Flats- 30 per filter
-
24 JimmyFlats per filter
Capture Software:
- Captured using N.I.N.A.
PixInsight Processing:
-
BatchPreProcessing (with premade JimmyFlats)
-
StarAlignment
-
ImageIntegration
-
DrizzleIntegration (2x, Var β=1.5)
-
DynamicCrop
-
DynamicBackgroundExtraction
duplicated each image and removed stars via StarXterminator. Ran DBE with a shitload of points to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)
$T * med(model) / model
Luminance:
-
BlurXTerminator (correct only mode)
-
ArcsinhStretch + histogramtransformation to bring nonlinear
RGB:
-
ChannelCombinaiton to combine monochrome R, G, B stacks into color image
-
BlurXTerminator (correct only mode)
-
SpectroPhotometricColorCalibration
-
HSV Repair
-
ArcsinhStretch + histogramtransformation to bring nonlinear
-
Curves to saturate it a little
-
MLT for large scale chrominance noise reduction
Nonlinear:
-
LRGBCombination with stretched L as luminance
-
DeepSNR Noise reduction
-
Several CurveTransformations to adjust lightness, contrast, colors, saturation, etc.
-
Invert > SCNR > invert > SCNR to remove some greens and magentas
-
More curves
-
A little bit of noiseXterminator
-
DynamicCrop in on the clustert
-
Resample to 75%
-
Annotation
lefty7283 1 month ago • 100%
It may not be as big or well known as the other well known cluster in Hercules (M13), but it sure looks nice. Captured over 4 nights in July/August 2024 from a Bortle 9 zone
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-120MC for guiding
-
Moonlite Autofocuser
Acquisition: 6 hours 55 minutes (Camera at half Unity Gain, -15°C)
-
Lum - 209x60"
-
Red - 78x60"
-
Green - 62x60"
-
Blue - 66x60"
-
Flats- 30 per filter
-
24 JimmyFlats per filter
Capture Software:
- Captured using N.I.N.A.
PixInsight Processing:
-
BatchPreProcessing (with premade JimmyFlats)
-
StarAlignment
-
ImageIntegration
-
DrizzleIntegration (2x, Var β=1.5)
-
DynamicCrop
-
DynamicBackgroundExtraction
duplicated each image and removed stars via StarXterminator. Ran DBE with a shitload of points to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)
$T * med(model) / model
Luminance:
-
BlurXTerminator (correct only mode)
-
ArcsinhStretch + histogramtransformation to bring nonlinear
RGB:
-
ChannelCombinaiton to combine monochrome R, G, B stacks into color image
-
BlurXTerminator (correct only mode)
-
SpectroPhotometricColorCalibration
-
HSV Repair
-
ArcsinhStretch + histogramtransformation to bring nonlinear
-
Curves to saturate it a little
-
MLT for large scale chrominance noise reduction
Nonlinear:
-
LRGBCombination with stretched L as luminance
-
DeepSNR Noise reduction
-
Several CurveTransformations to adjust lightness, contrast, colors, saturation, etc.
-
Invert > SCNR > invert > SCNR to remove some greens and magentas
-
More curves
-
A little bit of noiseXterminator
-
DynamicCrop in on the clustert
-
Resample to 75%
-
Annotation
lefty7283 1 month ago • 100%
I originally planned on shooting this from a dark site on top of a mountain but my laptop had other plans. Ended up taking this from my driveway instead (at least when I still had a driveway), but I'm very pleased with the detail I got at just 610mm focal length. There are also a number of other galaxies in the uncropped pic including one over a billion light years away from us (calculated from redshift). This image was taken with a monochrome camera through filters for luminance (all visible light), red, green, blue, and Hydrogen-alpha (656nm), which were combined into a color image. The Hydrogen-alpha was combined with red (described below) to enhance the hydrogen nebulae in the galaxy (red splotches in the spiral arms). Captured on March 21, 22, 24, and 29th, 2021 from a Bortle 6 zone
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-120MC for guiding
-
Moonlite Autofocuser
Acquisition: 10 hours 2 minutes (Camera at Unity Gain, -15°C)
-
Lum - 106x120"
-
Ha - 30x300"
-
Red - 40x120"
-
Green - 40x120"
-
Blue - 50x120"
-
Darks- 30
-
Flats- 30 per filter
Capture Software:
- Captured using N.I.N.A. and PHD2 for guiding and dithering.
PixInsight Processing:
-
BatchPreProcessing
-
StarAlignment
-
ImageIntegration
-
DrizzleIntegration (2x, Var β=1.5) (Lum only)
-
StarAlign Ha, R, G, B stacks to drizzled L
-
DynamicCrop
-
DynamicBackgroundExtraction
Luminance:
-
EZ Decon + Denoise
-
ArcsinhStretch + histogramtransformation to bring nonlinear
RGB:
-
ChannelCombinaiton to combine monochrome R, G, B stacks into color image
-
PhotometricColorCalibration
-
SCNR green
Adding Ha:
I followed this tutorial which I find produces much better results than my previous NBRGBCombination script technique:
http://www.arciereceleste.it/tutorial-pixinsight/cat-tutorial-eng/85-enhance-galaxy-ha-eng
- PixelMath to make Clean Ha. This effectively isolates just the Ha from the red continuum spectrum
Ha-Q * (Red-med (Red))
Q=1.0416
-
PixelMath to combine Clean Ha
-
PixelMath to add Ha to RGB image ($T)
R= $T+B*(Ha_Clean - med(Ha_Clean))
G= $T
B= $T+B*0.2*(Ha_Clean - med(Ha_Clean))
B=3
HaRGB:
-
Slight SCNR
-
HSV Repair
-
ArcsinhStretch + histogramtransformation to bring nonlinear
-
ColorSaturation to slightly desaturate Ha regions
-
HistogramTransformation to further stretch to match lum brightness
Nonlinear:
-
LRGBCombination with stretched L as luminance
-
Several CurveTransformations to adjust lightness, contrast, colors, saturation, etc.
-
MoreSCNR
-
ACDNR
-
LocalHistogramEqualization
-
More Curves
-
ColorSaturation to slightly desaturate Ha regions
-
MMT noise reduction
-
EZ StarReduction
-
Final Curves
-
Resample to 60%
-
DynamicCrop to 3555x2000
-
Annotation
lefty7283 1 month ago • 100%
A lot of those tubes run on the inside of the engine. They’re 3D printed into the engine walls as it’s being made
lefty7283 1 month ago • 100%
Oh no! Where will I go to see OF spam bots now???
lefty7283 2 months ago • 100%
The satellites are normally dim, but sometimes the sun will hit them at just the right angle and reflect perfectly to you.
https://en.wikipedia.org/wiki/File%3AFlare_Simulation.gif
The old Iridium sats were cool because they could get to -9 magnitude for a few seconds if you were in just the right spot. You can also have some satellites that flare every few seconds if they're tumbling and keep hitting the sun at the right angle throughout the pass.
lefty7283 2 months ago • 100%
Honestly kinda looks more like a satellite flare with how symmetric it is.
btw, was any processing done to this?
lefty7283 2 months ago • 100%
Thanks! We won’t know the results for a couple weeks. The movie was dogshit!
lefty7283 2 months ago • 100%
Bad movie night with some friends tonight, and then absolutely nothing the rest of the weekend (we’re watching Adam Sandler’s first movie, Going Overboard). Just gotta make it through this mornings exam
lefty7283 2 months ago • 100%
NGC 5634 is a globular cluster about 80k lightyears away from us. It's pretty small compared to other globs like M13. I only spent an hour on this while waiting for other targets to come up the last time I was at a dark site. Captured on June 7th, 2024 from a Bortle 3 zone (Deerlick Astronomy Village)
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-120MC for guiding
-
Moonlite Autofocuser
Acquisition: 1hour 3 minutes (Camera at half Unity Gain, -15°C)
-
Lum - 24x90"
-
Red - 6x90"
-
Green - 6x90"
-
Blue - 6x90"
-
Flats- 30 per filter
Capture Software:
- Captured using N.I.N.A.
PixInsight Processing:
-
BatchPreProcessing
-
StarAlignment
-
ImageIntegration
-
DrizzleIntegration (2x, Var β=1.5)
-
DynamicCrop
-
DynamicBackgroundExtraction
duplicated each image and removed stars via StarXterminator. Ran DBE with a shitload of points to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)
$T * med(model) / model
Luminance:
-
BlurXTerminator (correct only mode)
-
ArcsinhStretch + histogramtransformation to bring nonlinear
RGB:
-
ChannelCombinaiton to combine monochrome R, G, B stacks into color image
-
BlurXTerminator (correct only mode)
-
SpectroPhotometricColorCalibration
-
HSV Repair
-
ArcsinhStretch + histogramtransformation to bring nonlinear
-
Curves to saturate it a little
Nonlinear:
-
LRGBCombination with stretched L as luminance
-
DeepSNR Noise reduction
-
Invert > SCNR > invert > SCNR to remove some greens and magentas
-
Several CurveTransformations to adjust lightness, contrast, colors, saturation, etc.
-
HistogramTransformations
-
More curves
-
DynamicCrop in on the clustert
-
Resample to 80%
-
Annotation
lefty7283 2 months ago • 100%
Only 7 years ago!
lefty7283 2 months ago • 100%
They transmit T cruzi (Chagas’ disease), which can cause heart failure
lefty7283 2 months ago • 100%
The second stage engine cover seemed to get ‘over inflated’ at T+4:07. And you can definitely see it’s in a lower orbit on the final screen right after SECO
lefty7283 3 months ago • 100%
I love procrastinating on processing my images! I got set up early at a dark site last month and decided to shoot the sun while it was still up. There were a shitload of sunspots, including AR3697 in the bottom right. This sunspot group was the one that gave us the wonderful aurora back in May (back when it was known as AR3664)
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Moonlite Autofocuser
-
Astrozap BAADER AstroSolar Density 5 filter
Acquisition:
- Green filter - 5000 frames at gain 139 and 0.324ms exposure
Capture Software:
- Captured using sharpcap
Processing:
-
Stacked the best 25% of frames in Autostakkert, 2X resample and autosharpened
-
Colorized using curves in Photoshop
-
More lightness/Hue Adjustments
-
Astrosurface wavelets to remove some grid artifacts from stacking
-
STF applied in pixinsight
-
Annotatation
lefty7283 3 months ago • 100%
I love procrastinating on processing my images! I got set up early at a dark site last month and decided to shoot the sun while it was still up. There were a shitload of sunspots, including AR3697 in the bottom right. This sunspot group was the one that gave us the wonderful aurora back in May (back when it was known as AR3664)
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Moonlite Autofocuser
-
Astrozap BAADER AstroSolar Density 5 filter
Acquisition:
- Green filter - 5000 frames at gain 139 and 0.324ms exposure
Capture Software:
- Captured using sharpcap
Processing:
-
Stacked the best 25% of frames in Autostakkert, 2X resample and autosharpened
-
Colorized using curves in Photoshop
-
More lightness/Hue Adjustments
-
Astrosurface wavelets to remove some grid artifacts from stacking
def going to be using this for any of my future planetary projects. Shoutout to Tom on the discord!
-
STF applied in pixinsight
-
Annotatation
lefty7283 3 months ago • 90%
lefty7283 3 months ago • 100%
Looks like a $843 million contract to deorbit it sometime in 2030, and the deorbit vehicle is going to burn up as well. They could maybe just send up a starship without any tiles/flaps at that point? Hopefully some of these commercial LEO stations really get going before then to replace it...
lefty7283 3 months ago • 100%
On the last test flight a few weeks ago both the booster and ship did powered soft landings in the ocean (even with the ship’s flap melting a bit)
lefty7283 3 months ago • 100%
I'm guessing it's called that because it's kinda headphone shaped. It was discovered in the 30's so I'm assuming only the brightest parts of the nebula were visible to the astronomers.
This image is a combination of false color narrowband images for the nebula itself, plus true color RGB stars (the nebula is mostly red and a little blue in true color). If you zoom in to the center you can see the very blue white dwarf that caused the planetary nebula to form. Also for those curious this is what a single 10 minute long Ha exposure looks like (image total is 83.5 hours exposure). Captured over 33 nights from Jan-May 2024 from a bortle 9 zone.
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-290mc for guiding
-
Moonlite Autofocuser
Acquisition: 83 hours 30 minutes (Camera at -15°C), NB exposures at unity gain and BB at half unity
-
Ha - 238x600"
-
Oiii - 247x600"
-
R - 54x60"
-
G - 53x60"
-
B - 54x60"
-
Darks- 30
-
Flats- 30 per filter
Capture Software:
- Captured using N.I.N.A. and PHD2 for guiding and dithering.
PixInsight Preprocessing:
-
BatchPreProcessing
-
StarAlignment
-
Blink
-
ImageIntegration per channel
-
DrizzleIntegration (2x, Var β=1.5)
-
Dynamic Crop
-
DynamicBackgroundExtraction 3x
duplicated each image and removed stars via StarXterminator. Ran DBE with a shitload of points to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)
$T * med(model) / model
Narrowband Linear:
-
Blur and NoiseXTerminator
-
StarXterminator to completely remove stars (to be later replaced by the RGB ones)
-
ArcsinhStretch to slightly stretch nonlinear
-
iHDR 2.0 script (low preset) to stretch each channel the rest of the way.
here's the link to the repo if you want to add it to your own PI install.
RGB Linear:
-
ChannelCombination to combine monochrome R G and B frame into color image
-
SpectroPhotometricColorCalibration
-
BlurXTerminator for star sharpening (correct only)
-
HSV Repair
-
StarXterminator to generate a stars-only image
-
ArcsinhStretch + HT to stretch nonlinear (to be combined with starless narrowband image later)
-
Invert > SCNR > invert to remove magentas
-
Curves to saturate the stars a bit more
Nonlinear:
- PixelMath to combine stretched Ha and Oiii images into color image (/u/dreamsplease's palette)
R = iif(Ha > .15, Ha, (Ha*.8)+(Oiii*.2))
G = iif(Ha > 0.5, 1-(1-Oiii)*(1-(Ha-0.5)), Oiii *(Ha+0.5))
B = iif(Oiii > .1, Oiii, (Ha*.3)+(Oiii*.2))
-
NoiseX again
-
Background Neutralization
-
Shitloads of Curve Transformations to adjust lightness, hues, contrast, saturation, etc
-
even more curves
-
Pixelmath to add in the stretched RGB stars only image from earlier
This basically re-linearizes the two images, adds them together, and then stretches them back to before. More info on it here)
mtf(.005,
mtf(.995,Stars)+
mtf(.995,Starless))
-
Couple final curves
-
Resample to 65%
-
DynamicCrop
-
Annotation
lefty7283 3 months ago • 100%
I'm guessing it's called that because it's kinda headphone shaped. It was discovered in the 30's so I'm assuming only the brightest parts of the nebula were visible to the astronomers.
This image is a combination of false color narrowband images for the nebula itself, plus true color RGB stars (the nebula is mostly red and a little blue in true color). If you zoom in to the center you can see the very blue white dwarf that caused the planetary nebula to form. Also for those curious this is what a single 10 minute long Ha exposure looks like (image total is 83.5 hours exposure). Captured over 33 nights from Jan-May 2024 from a bortle 9 zone.
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-290mc for guiding
-
Moonlite Autofocuser
Acquisition: 83 hours 30 minutes (Camera at -15°C), NB exposures at unity gain and BB at half unity
-
Ha - 238x600"
-
Oiii - 247x600"
-
R - 54x60"
-
G - 53x60"
-
B - 54x60"
-
Darks- 30
-
Flats- 30 per filter
Capture Software:
- Captured using N.I.N.A. and PHD2 for guiding and dithering.
PixInsight Preprocessing:
-
BatchPreProcessing
-
StarAlignment
-
Blink
-
ImageIntegration per channel
-
DrizzleIntegration (2x, Var β=1.5)
-
Dynamic Crop
-
DynamicBackgroundExtraction 3x
duplicated each image and removed stars via StarXterminator. Ran DBE with a shitload of points to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)
$T * med(model) / model
Narrowband Linear:
-
Blur and NoiseXTerminator
-
StarXterminator to completely remove stars (to be later replaced by the RGB ones)
-
ArcsinhStretch to slightly stretch nonlinear
-
iHDR 2.0 script (low preset) to stretch each channel the rest of the way.
here's the link to the repo if you want to add it to your own PI install.
RGB Linear:
-
ChannelCombination to combine monochrome R G and B frame into color image
-
SpectroPhotometricColorCalibration
-
BlurXTerminator for star sharpening (correct only)
-
HSV Repair
-
StarXterminator to generate a stars-only image
-
ArcsinhStretch + HT to stretch nonlinear (to be combined with starless narrowband image later)
-
Invert > SCNR > invert to remove magentas
-
Curves to saturate the stars a bit more
Nonlinear:
- PixelMath to combine stretched Ha and Oiii images into color image (/u/dreamsplease's palette)
R = iif(Ha > .15, Ha, (Ha*.8)+(Oiii*.2))
G = iif(Ha > 0.5, 1-(1-Oiii)*(1-(Ha-0.5)), Oiii *(Ha+0.5))
B = iif(Oiii > .1, Oiii, (Ha*.3)+(Oiii*.2))
-
NoiseX again
-
Background Neutralization
-
Shitloads of Curve Transformations to adjust lightness, hues, contrast, saturation, etc
-
even more curves
-
Pixelmath to add in the stretched RGB stars only image from earlier
This basically re-linearizes the two images, adds them together, and then stretches them back to before. More info on it here)
mtf(.005,
mtf(.995,Stars)+
mtf(.995,Starless))
-
Couple final curves
-
Resample to 65%
-
DynamicCrop
-
Annotation
lefty7283 3 months ago • 100%
Word of warning for those eating: there's a shot of some dirty dishwasher water at 10:35 [Follow up connextras video](https://www.youtube.com/watch?v=0Kp3bjm55xw)
lefty7283 3 months ago • 100%
Sh2-64 is the red nebula to the right of the image. It frames up pretty well with the more golden stars seen in the milky way core. I probably should've gotten more exposure time to help bring out some of the dark nebula details, but it was only clear for one night at the dark site (at least the night went perfectly, which is rare for trips out to the middle of nowhere). Captured on June 7th, 2024 from a Bortle 3 zone (Deerlick Astronomy Village)
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-290mc for guiding
-
Moonlite Autofocuser
Acquisition: 5 hours 44 minutes (Camera at half unity gain -15°C)
-
L - 76x120"
-
R - 32x120"
-
G - 32x120"
-
B - 32x120"
-
Darks- 30
-
Flats- 30 per filter
Capture Software:
- Captured using N.I.N.A. and PHD2 for guiding and dithering.
PixInsight Preprocessing:
-
BatchPreProcessing
-
StarAlignment
-
ImageIntegration per channel per panel
-
DrizzleIntegration (2x, Var β=1.5)
-
Dynamic Crop
-
DynamicBackgroundExtraction
Luminance Linear:
-
BlurXterminator (Correct only)
-
NoiseXterminator
-
HistogramTransformation + sketchpad's iHDR script (low preset) to stretch to nonlinear
RGB Linear:
-
ChannelCombination to combine monochrom R G and B stacks into color image
-
SpectrophotometricColorCalibration
-
BlurXterminator (correct only)
-
HSV repair
-
ArcsinhStretch + iHDR script (low preset) to stretch to nonlinear
Nonlinear Processing:
-
LRGBCombination using stretched L as luminance
-
DeepSNR
-
Various curve adjustments for lightness, contrast, hue, saturation, etc (with varying lum/star masks)
-
Slight SCNR green
-
ColorSaturation to boost the saturation of the Ha region
-
More curves
-
NoiseXterminator
-
invert > SCNR > invert to remove some magentas
-
LocalHistogramEqualization
two rounds at scale 16 and 132 to target different sized structures
-
LOTS more curve adjustments
-
MultiscaleLinearTransform for chrominance noise reduction
-
Even more curves
-
Resample to 60%
-
Annotation
lefty7283 3 months ago • 100%
Sh2-64 is the red nebula to the right of the image. It frames up pretty well with the more golden stars seen in the milky way core. I probably should've gotten more exposure time to help bring out some of the dark nebula details, but it was only clear for one night at the dark site (at least the night went perfectly, which is rare for trips out to the middle of nowhere). Captured on June 7th, 2024 from a Bortle 3 zone (Deerlick Astronomy Village)
Places where I host my other images:
-
TPO 6" F/4 Imaging Newtonian
-
Orion Sirius EQ-G
-
ZWO ASI1600MM-Pro
-
Skywatcher Quattro Coma Corrector
-
ZWO EFW 8x1.25"/31mm
-
Astronomik LRGB+CLS Filters- 31mm
-
Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
-
Agena 50mm Deluxe Straight-Through Guide Scope
-
ZWO ASI-290mc for guiding
-
Moonlite Autofocuser
Acquisition: 5 hours 44 minutes (Camera at half unity gain -15°C)
-
L - 76x120"
-
R - 32x120"
-
G - 32x120"
-
B - 32x120"
-
Darks- 30
-
Flats- 30 per filter
Capture Software:
- Captured using N.I.N.A. and PHD2 for guiding and dithering.
PixInsight Preprocessing:
-
BatchPreProcessing
-
StarAlignment
-
ImageIntegration per channel per panel
-
DrizzleIntegration (2x, Var β=1.5)
-
Dynamic Crop
-
DynamicBackgroundExtraction
Luminance Linear:
-
BlurXterminator (Correct only)
-
NoiseXterminator
-
HistogramTransformation + sketchpad's iHDR script (low preset) to stretch to nonlinear
RGB Linear:
-
ChannelCombination to combine monochrom R G and B stacks into color image
-
SpectrophotometricColorCalibration
-
BlurXterminator (correct only)
-
HSV repair
-
ArcsinhStretch + iHDR script (low preset) to stretch to nonlinear
Nonlinear Processing:
-
LRGBCombination using stretched L as luminance
-
DeepSNR
-
Various curve adjustments for lightness, contrast, hue, saturation, etc (with varying lum/star masks)
-
Slight SCNR green
-
ColorSaturation to boost the saturation of the Ha region
-
More curves
-
NoiseXterminator
-
invert > SCNR > invert to remove some magentas
-
LocalHistogramEqualization
two rounds at scale 16 and 132 to target different sized structures
-
LOTS more curve adjustments
-
MultiscaleLinearTransform for chrominance noise reduction
-
Even more curves
-
Resample to 60%
-
Annotation
# **PLEASE do not look at the sun unless you are wearing proper eclipse glasses.** On Monday April 8th, 2024 there will be a total solar eclipse over the USA, Mexico, and Canada. If you are able to travel to the path of totality, I'd highly recommend it, as the next eclipse over the US won't be until 2045. The difference between a 99% partial eclipse and totality is literally night and day. Remember: it is only safe to look without solar filters *during the totality period* if you are in the narrow band where totality occurs. **These are good resources for finding out exactly when/how long totality will occur for your location, as well as recommended camera exposure settings:** http://xjubier.free.fr/en/site_pages/solar_eclipses/TSE_2024_GoogleMapFull.html http://xjubier.free.fr/en/site_pages/SolarEclipseExposure.html **Here is some random assortment of advice:** * Don't forget your solar filter. This goes on the **FRONT** of your lens/telescope before the light hits any of the optics. Do not look through a telescope or viewfinder with only eclipse glasses on your eyes. You will burn your retinas and damage your equipment. * Have backup location(s) in case your main observing spot is cloudy on the day of. * Use an intervolometer or control your camera via PC to automate your camera during totality. It's better to take in the eclipse with your own eyes instead of fiddling with camera settings. If something goes wrong at the last minute just leave it be and enjoy the eclipse. * Do a *full practice run* to test out all of you equipment before hand. Get used to taking your solar filter on and off quickly. Bring extra batteries, cables, SD cards, etc. * You're gonna be outside for a while on a (hopefully) sunny day. Bring plenty of water, suncreeen, and snacks. * Don't forget your solar filter. You want to focus your camera during the partial phases with the filter on, so that way you're ready to go as soon as totality starts. * Be prepared for eclipse traffic. During the 2017 eclipse I drove to my site in 3 hours the day before, and took 9 hours to drive back right after the eclipse. Top off on gas beforehand. * For those with widefield setups, [comet 12P will be fairly close to the eclipse](https://i.imgur.com/YJIgMoW.png) and about mag +4.7. Several planets will be visible too. * It's okay if you aren't exactly on the centerline in the path of totality. Even going 2 miles into the zone of totality will get you a whole minute of total eclipse time, and going halfway to the centerline will get you over 3 minutes. * At this point it's probably too late to book a flight or hotel that isn't stupidly expensive. Personally, I'm gonna sleep in a walmart parking lot the night before the eclipse. * DON'T forget your solar filter. Please keep our community rules in mind when sharing your eclipse pics (titles, acquisition/processing info, etc). I can't wait to see what everyone is going to capture in just a few more weeks!