Quote:
Originally Posted by NTgazer
Hi Bob I have 10mm and 20mm plossl and a 2x Barlow. The plossls are unbranded and came with the scope when I purchased it second hand. On Jupiter I can see banding and am wondering what a better quality, higher mag eyepiece will show me
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Try looking for the Red Spot on Jupiter tonight. It should be easily visible from about 7.30 to 11.30 NT time. There are online sites that U can check for these times and events of Jupiter's moons. For example:
https://www.shallowsky.com/jupiter/
Also try your 10mm with the barlow. This will give you an idea on how a 5mm EP may perform at 240x. That magnification would be too high for my local atmosphere, but U can only try it & see. When I owned a 8' Dob, I generally used a 14mm EP with a 2xbarlow for my highest magnification.
If possible, find a local Astronomy Group and U may obtain a much better insight to the equipment that U need (like looking though somebody else's EP). Kinda like trying before U buy.
Good luck and stay in touch.