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#11476 steveincolo

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Posted 20 November 2023 - 04:33 PM

Still playing with my "new" ASI2600MC (I had to send my old faithful ASI294MM back to China under RMA as it started acting up last week). It's not particularly new as I got it last Xmas, but it found little use save with my Hyperstar(s), and I wanted to see how it performed with a bit more focal length.

 

Target: NGC 891, aka Caldwell 23

When: November 19, 2023, around 10pm

Where: Cévennes range, south of France, Bortle 4.

Conditions: some high clouds, FWHM around 3.6 arcsec, 40% moon

Setup: C6 SCT, RST-135 guided, Starizona Corrector IV, ASI2600MC bin1 (should probably have used bin2 instead), 180s exposures, darks, flats

 

Here's the save as seen, cropped and resized for posting. That livestack not particularly well defined: on the right of the dark dust lane, there's a slightly oblong yellow-orange star that should be resolved into what it is in reality: a double star with a separation of almost 3.7 arcsec. Seeing killed me on this one. That said, I still got some nice detail in the dust lane proper. Also, numerous small background galaxies around mag 17 in that narrow field, and even a quasar!

15x180s

I spent a very long time fine tuning the color channels to get something as neutral as possible, which meant bumping up reds and blues to overcome the camera's tendency to paint everything green. Sharpcap's keyboard shortcuts helped a lot here (click on the color handle, then fine movements can be done with the up/down arrows)

attachicon.gif Stack_15frames_2700s_WithDisplayStretch.jpg

Very nice!  I had never known about the double star before, but now I can see it in other images.  Without more than a brief digression, I hope, did you find the vignetting serious with the Starizona corrector on the C6?


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#11477 Clouzot

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Posted 20 November 2023 - 05:08 PM

Very nice!  I had never known about the double star before, but now I can see it in other images.  Without more than a brief digression, I hope, did you find the vignetting serious with the Starizona corrector on the C6?

That double star in NGC 891 is one of my standard EAA stress tests (I think I mentioned the double central star of the Skull Nebula in this month's challenge, that's another example. I have a whole list for a number of objects, which I gathered here and there, including the EAA Gallery!)

To answer your question: with the C6, even if it's only running at f/8 with the Starizona corrector, vignetting is very high with the 2600: I measured 60% attenuation in the corners of the sensor wrt the center. It calibrates out OK with a good flat, though (but now that the C6 "diamond ring" artifact are gone, my main problem is... coma).

 

Here's another from last night, this time with the full FoV of the 2600MC:

M33, 3x300s, darks+flats, and my trademark 1000% color saturation (that's the risk when you give a color camera to someone who's been doing mono EAA since 2020).

 

Here, I wanted to retain the "natural" colors of M33, whose core should be yellow, arms have all these blue clumps (there's the duck blue IC 132 that looks like a small snowball at the end of one arm), with scattered red HII regions (including my beloved NGC 604)

I think the flat handles correctly the vignetting but it's hard to judge with such a large galaxy.

Screenshot 2023-11-19 230511.jpg


Edited by Clouzot, 20 November 2023 - 05:09 PM.

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#11478 astrohamp

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Posted 20 November 2023 - 05:18 PM

Sculptor Galaxy NGC 253 11/16/23 9:13pm with measured Mpsas 19.1 in object's direction observing over the metal roof of my house 5 degrees west of the meridian about 22:30 degrees altitude.  With average Seeing and Transmissibility predicted (via astrospheric), expectations were also average although typical of a good 'day' in New England. A long 43 stack of 16s subs in Sharpcap.  Compass/inclinometer polar alignment due to trees with leaves...still.

 

Flattened 102mm aperture at 714mm focal length using an ASI2600MC unguided RST135e, no darks, flats, hits, or errors... which brings up an interesting aspect of an image 'defect'. 

 

4k full frame over 100% 'zoom' image(s) presentation reduced by dual HD screen reduction/capture (1928x2160) further reduced/compressed via Paint to 1200x1344.

 

Interesting in that I have found hot pixels appear to display my mounts 'tracking' error for the image.  Easiest to see in green with one just under and to the left of the galaxy.  The things one learns during the EAA learning curve.

 

 

 

Attached Thumbnails

  • NGC253SvxTaSaFlatMpsas19-1G200E16Ma2.jpg

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#11479 Bob Campbell

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Posted 20 November 2023 - 05:27 PM

That double star in NGC 891 is one of my standard EAA stress tests (I think I mentioned the double central star of the Skull Nebula in this month's challenge, that's another example. I have a whole list for a number of objects, which I gathered here and there, including the EAA Gallery!)

To answer your question: with the C6, even if it's only running at f/8 with the Starizona corrector, vignetting is very high with the 2600: I measured 60% attenuation in the corners of the sensor wrt the center. It calibrates out OK with a good flat, though (but now that the C6 "diamond ring" artifact are gone, my main problem is... coma).

 

Here's another from last night, this time with the full FoV of the 2600MC:

M33, 3x300s, darks+flats, and my trademark 1000% color saturation (that's the risk when you give a color camera to someone who's been doing mono EAA since 2020).

 

Here, I wanted to retain the "natural" colors of M33, whose core should be yellow, arms have all these blue clumps (there's the duck blue IC 132 that looks like a small snowball at the end of one arm), with scattered red HII regions (including my beloved NGC 604)

I think the flat handles correctly the vignetting but it's hard to judge with such a large galaxy.

attachicon.gif Screenshot 2023-11-19 230511.jpg

very nice!

 

I was wondering when you were going to use that avatar!

 

 

 

Bob


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#11480 dave85374

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Posted 20 November 2023 - 11:10 PM

To astrohamp:

 

Those green squiggly green worms per Dean at Starizona are just "green worms".  Not a scientific term but I have had the same "worms" and Dean told me to just take new darks.  I notice you are not using any darks so you might take some as they are very easy to make.  I have had to retake darks from time to time and they always fixed the problem.


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#11481 astrohamp

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Posted 21 November 2023 - 12:41 PM

Yeah dave' "green worms", red and blue hot pixels as well usually diminish with my camera cooler 5 degree operating temperature.  Was there without power assist due to ambient cold although fan may have been on.  I probably had a 5 degree C dark at gain 100 I could have tried just decided to run simplified not even guiding.

 

Stars are a bit pixelated so the peak-to-peak of the worms is probably the contributing factor to star fuzz, bloat, lack of point definition.

 

Also need to check for fan vibration 'problem' others have discussed in the forums.  This may be the real contributing issue, well other the the wonderful seeing we get in New England.



#11482 Borodog

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Posted 21 November 2023 - 02:31 PM

:O)

 

Capture__00001_WithDisplayStretch.png


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#11483 BrentKnight

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Posted 21 November 2023 - 02:46 PM

Please provide us a little more information about your capture.


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#11484 Borodog

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Posted 21 November 2023 - 03:00 PM

Please provide us a little more information about your capture.

Captured in SharpCap 4.1. 1100 EdgeHD at f/10. Saved as displayed in the new Live Planetary Stacking/Enhancement tool in SharpCap 4.1, although I did rotate it in post.

 

SharpCap4.1_Live_Planetary_Stacking_2.png


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#11485 kevinrodgers22

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Posted 21 November 2023 - 09:13 PM

Captured in SharpCap 4.1. 1100 EdgeHD at f/10. Saved as displayed in the new Live Planetary Stacking/Enhancement tool in SharpCap 4.1, although I did rotate it in post.

 

attachicon.gif SharpCap4.1_Live_Planetary_Stacking_2.png

Wow man, that's awesome! I have not heard of such sorcery, you've just opened up a whole can of worms on this forum...


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#11486 Borodog

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Posted 21 November 2023 - 09:28 PM

You have not heard of it because it just dropped yesterday. :O)

https://www.cloudyni...ng-in-sharpcap/

Edited by Borodog, 21 November 2023 - 09:29 PM.

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#11487 Tom Andrews

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Posted 22 November 2023 - 12:29 AM

Just joined the Unistellar universe in September after 11 years using a Mallincam Xtreme. Due to health reasons I needed to downsize and simplify and I am impressed with and really enjoying viewing with the Equinox 2. I just wanted to share some snapshots of the live views:

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#11488 Tom Andrews

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Posted 22 November 2023 - 12:33 AM

Next:

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  • eVscope-20230906-042502a.jpg
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#11489 Tom Andrews

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Posted 22 November 2023 - 12:36 AM

3.

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  • eVscope-20230907-064043a.jpg
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#11490 Tom Andrews

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Posted 22 November 2023 - 12:38 AM

4.

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  • eVscope-20231004-030748a.jpg
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#11491 Tom Andrews

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Posted 22 November 2023 - 01:21 PM

What's amazing to me is getting that much of the Helix with no filter. That snapshot was taken at 60 minutes but I actually let it go another hour and got significantly more nebulosity. On the other hand I tried the Cat's Eye Nebula and after 30 minutes had virtually nothing so gave up.

 

Since the Unistellar is new to me I'm letting it go for up to 2 hours per object just to see what it will do. My normal routine is to scan 360 degrees to see as many objects as possible in 2-3 hour spans which I will get back to once I'm finished testing the limits.

 

All in all, I'm very pleased with this smart scope and due to my circumstances the price was worth it to keep me in the hobby for as long as possible.


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#11492 Tom Andrews

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Posted 22 November 2023 - 01:30 PM

I was also amazed at being able to see the Pillars of Creation in the Eagle Nebula (I could never see those in my Mallincam images). And that was only a 15 minute exposure. I need to retry that at an hour.


Edited by Tom Andrews, 22 November 2023 - 01:32 PM.

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#11493 dob45

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Posted 23 November 2023 - 06:34 AM

Last night I used a old SLR lens ( Yashica 50mm focal length f/1.9  @ f/2.8  )  with my ASI 178 MM and 7nm H-alfa filter. Ioptron Mini Tower II az mount.
Very good transparency but moon at 76%.

 

ngc 1499 (California nebula) : 127 x 8s = 16,9 min

california_Stack_127frames_1016s.jpg

 

ngc 7000 + ic   5067/70 (North America and Pelican nebula)+ ic 5068 : 120x8s = 16 min

ngc 7000_Stack_120frames_960s.jpg

 

Sadr + ic 1318 + ngc 6888 (Crescent) : 113 x 8s = 15 min

Sadr_Stack_113frames_904s.jpg


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#11494 TheWhistler

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Posted 25 November 2023 - 10:15 AM

I was finally able to find the weak link in my process that's been resulting in really grainy pictures. The problem was my dark frames. On Thursday night, I took some shots of the same targets with my usual dark frames and then the same thing swapped for Sharpcap's hot pixel removal. As soon as I did that, the graininess was gone. Nothing like the classic case of user error. My recent dark frames were taken inside rather than outside at two totally different temperatures. Here's a few shots without any graininess. 

 

Date: 11/23/23
EAA Target: NGC 281
Scope: AT60ED
Camera: ZWO 533MC
Filter: UV/IR
Exposure: 20 seconds
Time: 25 minutes

 

11.23.23 NGC 281

 

Date: 11/23/23
EAA Target: NGC 224
Scope: AT60ED
Camera: ZWO 533MC
Filter: UV/IR
Exposure: 20 seconds
Time: 30 minutes

 

11.23.23 NGC 224
 
This next one was unexpected. I was out until 2AM stepping through all of my Sharpcap settings to find the source of the graininess. At this point, targets that I normally can't see from my balcony were creeping over the roof. I wish I let this next stack run longer. I cut it short because I also wanted to test a new 678MC camera.
 
Date: 11/23/23
EAA Target: M45
Scope: AT60ED
Camera: ZWO 533MC
Filter: UV/IR
Exposure: 20 seconds
Time: 7 minutes
 
11.23.23 M45

 

When I first started testing the newly purchased 678MC I was underwhelmed until I took a minute to realize I was going about it all wrong. I was testing on DSO as if I were using the 533MC. Jupiter and Uranus were in view for a short period of time. I didn't take the C8 out so my initial planet testing with the AT60ED wasn't anything worth sharing. Instead, I did a really quick test on a double cluster before packing everything up. Tonight is supposed to be clear. I'll take the C8 out to hopefully get another shot at Jupiter and Uranus. 

 

Date: 11/23/23
EAA Target: NGC 869 & 884
Scope: AT60ED
Camera: ZWO 678MC
Filter: UV/IR
Exposure: 10 seconds
Time: 5 minutes

 

11.23.23 NGC 869 & 884

 


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#11495 dob45

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Posted 26 November 2023 - 10:21 AM

Last  night, again,  I used the old reflex lens because the forecast gave a strong jet-stream. Very good transparency,  Moon at 97% ,  Bortle 8.
Yashica 50mm focal length f/1.9  @ f/2.8  + asi 178 MM +  7nm H-alfa filter + Ioptron Minitower AZ  mount.
For the first time I used 15 seconds exposures.

 

Barnard's Loop + Flame + Horse Head nebula : 68 x 15s = 17 min

Barnard loop_Stack_68frames_1020s.jpg

 

ic 417 + ic 410 +  ic 405  (from left to right) : 64 x 15s = 16 min

ic405_15s_Stack_64frames_960s.jpg

 

Rosette Nebula : 50 x 15s = 12,5 min

Rosetta_Stack_50frames_750s.jpg


Edited by dob45, 26 November 2023 - 10:22 AM.

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#11496 TheWhistler

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Posted 26 November 2023 - 10:52 AM

Last night was initially forecasted to be clear all night. That changed to clouds by 10PM. I wanted to bring the C8 out. Since conditions changed, I used the AT60ED to mess around with the moon since everything else would be a wash. The first round of testing consisted of Sharpcap's live stacking of the moon. The first stack was with a 533MC and the second a 678MC. The results were decent. 

 

Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 533MC
Filter: UV/IR
Exposure: 0.86ms seconds
Time: 6 minutes

 

11.25.23 Moon V1

 

Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 678MC
Filter: UV/IR
Exposure: 0.86ms seconds
Time: 6 minutes

 

11.25.23 Moon V2
 
After that, I switched to ASIStudio's video capture and video stacking. I'll link the results since these technically were not EAA. Video stacking yielded really nice results in half the time compared to live stacking. The video stacks were taken while the moon was popping in and out clouds. 
 
Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 533MC
Filter: UV/IR
180 second video stack
 
I then switched to the 678MC and the Optolong L-Pro to get rid of the yellow tint. Two different videos stacks. 
 
Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 678MC
Filter: L-Pro
180 second video stack
 
Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 678MC
Filter: L-Pro
180 second video stack
 

I would have liked to try the same process with Jupiter if it weren't for clouds completely taking over. I'll give that a go one day this week with the C8. 


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#11497 steveincolo

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Posted 26 November 2023 - 12:51 PM

Last night was initially forecasted to be clear all night. That changed to clouds by 10PM. I wanted to bring the C8 out. Since conditions changed, I used the AT60ED to mess around with the moon since everything else would be a wash. The first round of testing consisted of Sharpcap's live stacking of the moon. The first stack was with a 533MC and the second a 678MC. The results were decent. 

 

Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 533MC
Filter: UV/IR
Exposure: 0.86ms seconds
Time: 6 minutes

 

 

 

Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 678MC
Filter: UV/IR
Exposure: 0.86ms seconds
Time: 6 minutes

 

 
 
After that, I switched to ASIStudio's video capture and video stacking. I'll link the results since these technically were not EAA. Video stacking yielded really nice results in half the time compared to live stacking. The video stacks were taken while the moon was popping in and out clouds. 
 
Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 533MC
Filter: UV/IR
180 second video stack
 
I then switched to the 678MC and the Optolong L-Pro to get rid of the yellow tint. Two different videos stacks. 
 
Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 678MC
Filter: L-Pro
180 second video stack
 
Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 678MC
Filter: L-Pro
180 second video stack
 

I would have liked to try the same process with Jupiter if it weren't for clouds completely taking over. I'll give that a go one day this week with the C8. 

Your Moon videos stacks are wonderful!  I'd love to see this be viable for EAA.  The Moon's phases mean something new every night.  


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#11498 TheWhistler

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Posted 26 November 2023 - 02:28 PM

Your Moon videos stacks are wonderful! I'd love to see this be viable for EAA. The Moon's phases mean something new every night.


Thanks! It's such a simple process especially for how short the videos are compared to live stacking. Would be great to see an evolution of video stacking meet EAA requirements.
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#11499 kg7

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Posted 30 November 2023 - 05:39 PM

43 minutes of 1m subs of C11, the bubble nebula, from a few nights ago.  C8 with 0.63FR, with l-ultimate in front of an ASI1600mc binned 2x2, from a Bortle 8.  Saved as seen in sharpcap, then cropped for forum posting.

 

med_gallery_428272_22635_86042.png


Edited by kg7, 30 November 2023 - 07:25 PM.

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#11500 Bob Campbell

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Posted 30 November 2023 - 07:32 PM

Last night was initially forecasted to be clear all night. That changed to clouds by 10PM. I wanted to bring the C8 out. Since conditions changed, I used the AT60ED to mess around with the moon since everything else would be a wash. The first round of testing consisted of Sharpcap's live stacking of the moon. The first stack was with a 533MC and the second a 678MC. The results were decent. 

 

Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 533MC
Filter: UV/IR
Exposure: 0.86ms seconds
Time: 6 minutes

 

 

 

Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 678MC
Filter: UV/IR
Exposure: 0.86ms seconds
Time: 6 minutes

 

 
 
After that, I switched to ASIStudio's video capture and video stacking. I'll link the results since these technically were not EAA. Video stacking yielded really nice results in half the time compared to live stacking. The video stacks were taken while the moon was popping in and out clouds. 
 
Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 533MC
Filter: UV/IR
180 second video stack
 
I then switched to the 678MC and the Optolong L-Pro to get rid of the yellow tint. Two different videos stacks. 
 
Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 678MC
Filter: L-Pro
180 second video stack
 
Date: 11/25/23
EAA Target: Moon
Scope: AT60ED
Camera: ZWO 678MC
Filter: L-Pro
180 second video stack
 

I would have liked to try the same process with Jupiter if it weren't for clouds completely taking over. I'll give that a go one day this week with the C8. 

You should try the new planetary live stack option in the latest sharpcap.

 

 

https://www.cloudyni...cap/?p=13079882

 

 

Then the images will conform to the EAA guidelines.

 

The moon might be too big for the current version, but it might be worth a try if the whole disk is in your FOV

 

Bob


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