5 replies to this topic

[revans]

This morning I imaged part of the solar limb with my AT102EDL, Quark Chromosphere filter, and  ASI178MM camera on my EQ6-R Pro mount.  I captured a 27 minute time lapse in monochrome starting at 10:14am EDT.  I didn't colorize the data (at least for now).  It was complicated enough to produce the video in monochrome. Here is the video on Astrobin.  Click on the play icon when you arrive.
 
Rick
 

[rigel123]

Nice start Rick!  Nothing wrong with monochrome.  You do have some Newton Rings to contend with and adding a tilt mechanism to your camera should help to negate those.

[revans]

Nice start Rick!  Nothing wrong with monochrome.  You do have some Newton Rings to contend with and adding a tilt mechanism to your camera should help to negate those.

I did have a tilt adapter on the camera and adjusted it several times.  The rings still came in some but not all images and they were visible mostly after processing and sharpening.  My big error was that I forgot to check the Newton's Ring's removal  box in ImPPG during processing (I was pre-occupied with too many newly learned processing techniques).  Oh well... it is a start... (I seem to say that alot). I can always go back and check that box, but it takes time. 

 

Rick

[Spectrum222]

Nice video run Rick! Yes, those rings can be a bit of a challenge, but I look forward to your re-run when time permits you - nice to see that detail morph in time! Nice run!

 

FYI, the nice thing with monochrome is that it shows luminance/brightness variations really well. I do amateur radio also, and when I run a "waterfall" display on my webradio runs, I set my settings to monochrome also instead of a "rainbow" color - I find it easier to see the faint modulations on those stations more easily... 

 

Darren

[rigel123]

I did have a tilt adapter on the camera and adjusted it several times.  The rings still came in some but not all images and they were visible mostly after processing and sharpening.  My big error was that I forgot to check the Newton's Ring's removal  box in ImPPG during processing (I was pre-occupied with too many newly learned processing techniques).  Oh well... it is a start... (I seem to say that alot). I can always go back and check that box, but it takes time. 

 

Rick

If Newton Rings are going to show up, an animation is always going to bring them out.  The reason I believe is that they vary from frame to frame with some not having any at all but when you put them all together the changing rings really show up.  I have noticed that high clouds that you might not notice can also bring out Newton Rings that might not show in a perfectly clear sky.  Ahhh the challenges of animations!

[revans]

I re-did the animation this time checking the Newton's Ring removal box in ImPPG.  The result was only marginally improved though. I didn't bother replacing the video clip on Astrobin with the new processing as the difference was small.   I think the best thing is to avoid getting them in the first place.  But they are definitely more obvious after processing and much more obvious watching the video than in a single frame as has been said above.  I actually thought at the time that my adjustments of the tilt adapter had been successful.... but not so much.  

 

Well, my back to work cycle is starting up again (I'm only semi-retired) and I won't have time to get new data for a few days.  All I'll have time for is maybe the occasional deep sky image at night.  When you are doing solar you don't have time to do anything else because the imaging and processing is so much more hands on than deep sky.  And so, I find myself thinking more about equipment upgrades during those lulls in activity

 

Rick