QHY5 extension for ST80

[GeekTeacher]

Hi

High guys, astro newbie alert here - I've just bought some secondhand gear and I'm trying to set up guiding with a QHY5P-IIC,  a Skywatcher ST80 and PHD2 all connected via ASCOM.

The trouble is I don't think I've got all the bits that would come with a new ST80 and I've got all sorts of extension tube odds and ends, very few of which seem to fit together. (I also got a SkyWatcher 200p scope with it, so some bits will be for that, but that's not the issue here.)

At first I couldn't seem to focus on anything, but by adding a 40mm extension tube and a weird cone-shaped thing (what's that all about?), I've managed to focus on land-based objects.

Anyway, the photo shows the best I've come up with for trying to achieve focus with the QHY5P-IIC and ST80.  Does this look about right for guiding on the stars?

So I can focus during the day on neighbours' houses, but I'm struggling at night to get sharp focus on stars in PHD2.  Can you tell me the best gain, looping and any other camera settings I might be missing for the QHY5P-IIC.

I've set my target area to 50 pixels, my scope size to 400mm, and pixel size is 2.2. I've also calibrated a dark library.

In addition, after I've set everything up and start looping in pHD2, the stars are constantly moving in my onscreen image, despite having pretty good polar alignment.  This isn't right, is it? But why? Something to do with the mount settings?

Any suggestions for where to go next with this please? All help will be much appreciated.

Cheers, Martyn

P.S. Excuse the curtains!

Edited April 3, 2020 by GeekTeacher
Photo doubled.