April 26, 2020: Lunar crescent with 80 mm triplet

[michael.h.f.wilkinson]

I set up my APM 80mm F/6 triplet on the GP-DX mount for a session on deep sky, but decided to snap the moon with the ASI183MC and a Meade 2x TeleXtender in place. Stacked 250 out of 2000 frames with AS!3, sharpened using ImPPG, final tweaks in GIMP

Well worth a click for full size.

 

[richard ashbee]

some good detail Michael

[vlaiv]

Top part almost got me headache.

There is something wrong with panel alignment - everything is "doubled" / looks out of focus (but not telescopic focus - too much beer out of focus )

Bottom part is nice and sharp.

 

[michael.h.f.wilkinson]

4 minutes ago, vlaiv said:

Top part almost got me headache.

There is something wrong with panel alignment - everything is "doubled" / looks out of focus (but not telescopic focus - too much beer out of focus )

Bottom part is nice and sharp.

 

You are right, I wonder if the chip was truly square on the optical path. I have some other stacks of the same data. But first get the DSO imaging working. 

[bomberbaz]

I looked at it and thought brilliant and noticed nothing extra until vlaiv mentioned the top. It looks a little stretched kind of to me.

Edited April 26, 2020 by bomberbaz

[michael.h.f.wilkinson]

This seems to be better, but I still feel the southern part is better than the northen