Couple of questions for folks. I've been using a skymax 127 cas mak OTA to start a humble beginning in astronomoy and astrophotography and I've been loving getting involved. I've been out for a few evenings of late and have noticed a couple "issues" that I've been having repeteadly and wondering if I'm being hardware limited or that I'm doing something a little wonky.
I've found when finding planets visually (mainly saturn / jupiter) and bringing them into focus I've been doing a good job. (Using either a 10 or 25mm EP with and without a 2x barlow) but when I get the planet centred and tracking properly I'll switch over to my camera and refocus / recentre on the sensor. I've been targetting saturn mainly lately just because its higher in the sky earlier in the night and I've been using a 1.5 barlow on my OTA for it. I've been having a really rough time focusing and getting a nice crisp image on my laptop screen during the capture, its usually very grainy / granulated. Ive been aiming for 10 +/- 5ms exposure times then aiming to have the rgb histograms around 70% (I can put some screenshots in if people would like). Then when i go to process and stack the images, I am getting quality curves in autostakkert that are relatively flat and steady but sits on the 30% quality line (again can provide screenshots if needed). I tried capturing a couple times without the 1.5x Barlow and the image "quality" was better but still quite low.
I guess I'm just wondering if
a) live capture image on screen is supposed to be quite granulated / grainy / unfocused?
b) can I do anything to help "focus" the planets better on my camera sensor
c) what can I expect on a small cas mak ota
n.b most sessions have been on relatively good seeing conditions