Stub Mandrel

Not me, but that's a good idea.

I've been quiet for a while. It's ggod to see lots of great new images with teh 120P-DS Here are some of my latest images with mine.

🙂 Equally true of imaging - if not more so!

RGB image of Mare Crisium.

My first pair of planets using an ASI178MM.

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I've seen it low down with atmospheric dispersion, each short 'tick' is a spectrum from red to blue. You can actually use it to adjust an atmospheric dispersion corrector, as when it's set right the pattern becomes straight. I might also he caused by chromatic aberration with a frac.

Hmm. I 'tuned' my HEQ5 rather than 'modding' it and have got as low as 0.6". I've since fitted a Rowan kit but have only used it for planetary since. To be honest, I think the biggest issue is getting the worm gear engagement right.

I'm late to the party, but Ii found I had to do a fair bit of editing to get my image right. I cropped away the top while adjusting maptex_top and cropping away the bottom of the image until it was properly aligned AND in proportion. I also had to be very careful to match the view to the exact spot where I put my scope.

Can you swing the camera around by its strap? But seriously the correct answer is the longest exposure possible, so the fewest subs you can get away with to give your cronky laptop a chance to stack them before the zomb...

I think the limit on resolution is mostly down to my scope, it's only 6" aperture, which give a theoretical resolution one 1 arc-0second, about 1/20th of the diameter. Stacking and drizzle improve that a bit, but I think I need at least an 11" scope to get much more.

It's been so frustrating waiting for a cloudless night, I've had a few aborted tries and last night I only managed Saturn, I saw about ten seconds of Jupiter on screen.

Not bad for a newbie 🤣 Actually, that's smashing especially for a single sub, you should be proud of that!

It's a wonderful time for anyone seeking a cheap set of 7nm Baader nb filters... I have a filter wheel that will take 31mm filters, not a lot extra.

This will finally let me put a Pentax lens on my SP1000 after 38 years 🙂 Plus should be good for wide field, apparently they are sharp all over stopped down to f2.8.