8” SCT Solar observing

[NGC 1502]

Hi to users of the popular 8” SCT.  I’m trying to advise someone regarding solar observing with an 8” Celestron SCT.  The user is familiar with the essential idea of using proper filters designed for the task and securely fitted. His enquiry relates to suitable magnifications, his lowest power is currently 80x with a 25mm eyepiece.

When I’m solar observing I generally use far lower powers than 80x because that gives a sharper view in the often turbulent daytime atmosphere.

Options include a 32 or 40mm Plossl for 63x or 50x, or an f6.3 focal reducer to obtain lower powers.  I’d be pleased if those of you who are familiar with the issue to advise with what kit you use.  Or maybe you find 80x gives ok views.  We’re considering visual use only.

Thanks in advance for your thoughts, Ed.

[michael.h.f.wilkinson]

I have had no issues using 80x with my C8 on the sun, especially when observing fairly early, when seeing is usually best 

[Peter Drew]

I've had pleasing solar views at 80x using a C8 with a full aperture white light filter.  Just pick a good day/time of day.       🙂

[Joe beaumont]

Thank you for your help Ed and everyone who commented, I’m gonna try the 25mm eyepiece and keep youse updated with my results when the filter arrives 

Joe 

[Nigella Bryant]

Early morning is best for solar observation and hopefully you'll be able to use higher power eyepieces as well. Viewing those sunspots when they occur and granulation is spectacular (use solar filter is mandatory). Have fun. 

[Neil H]

Hi I use space weather live app on my phone it will tell you how many Sun spots your see and were to look there is loads of info and the app is free , enjoy the bright side of this hobby 

Edited February 22, 2021 by Neil H
Typo

[Joe beaumont]

Hi all so I have used my solar filter with my 25mm eyepiece on my nexstar 8se, I used it about 1:30 in the afternoon so not best time for observing the sun but I noticed that it is really zoomed in and wonder what would be better to buy, 32mm eyepiece, 45mm eyepiece or a f6.3 focal reducer 

thank you all 

Joe 

[johninderby]

I find a zoom eyepiece is really useful for solar observing as you can zoom to the best mag to use that day.

The Hyoerflex 7-21 and Svbony 10-30 are really good and not very expensive.