22nd April 2021 around 22:00, Intermittent thin cloud. See links to higher resolution Astrobin images.
Celestron C8, Celestron AVX mount, Altair 183M (camera has an IR cut filter sensor window), hands-off focusing with JMI Moto-Focus.
Capture area = 1920x1200, 8-bit MONO, SER, 60s @ 35fps, Exposure=1ms, gain=800/5000
Software: SharpCap 4, Autostakkert!3 (stack best 15% with drizzle 1.5), GIMP.
https://www.astrobin.com/7j0qvt/?nc=user
https://www.astrobin.com/h12pnl/?nc=user
https://www.astrobin.com/ba39hn/?nc=user
https://www.astrobin.com/aro1nr/?nc=user
Dave
76% waxing moon, Altair 183M
Forum rules
Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.
Please share the equipment used and if possible camera settings to help others.
Please upload large images to photo sharing sites (flickr, etc) rather than trying to upload them as forum attachments.
Please share the equipment used and if possible camera settings to help others.
Re: 76% waxing moon, Altair 183M
Using Virtual Moon Atlas, I have found craters on the image which are only 2 miles in diameter.
Dave
Dave
Re: 76% waxing moon, Altair 183M
Some great shots Dave!!
Clavius especially really pops. I presume your seeing was good giving the fact the "only" 35fps?
Menno
Clavius especially really pops. I presume your seeing was good giving the fact the "only" 35fps?
Menno
Re: 76% waxing moon, Altair 183M
Thanks Menno. 35fps is the best I can get from the 183M and that is with the capture area reduced to 1920x1200. I think a lot of the detail comes from luck with how the disk is illuminated at the time of the shot.
Dave
Dave
Re: 76% waxing moon, Altair 183M
The are excellent photos Dave. Hadley Rille especially looks almost 3 D - but they are all good. You must have had focus to a tee as well as good lucky imaging. I guess that f = 2000 mm helps too.
TimH
TimH
Re: 76% waxing moon, Altair 183M
Thanks Tim. With the C8 I have a JMI Motorised focuser which is on a lead. With the hands-off focusing I can get close to the laptop to study the image. I always
Dave
- Highlight Over Exposed in the FX dropdown
- Over expose slightly
- Set Zoom to at least 125%
- Focus by using a crater which has some features in the bottom
- Set Zoom to Auto
- Reduce exposure until Right Hand Side of a log histogram is around 60% saturation
Dave