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I am thinking of getting a Lunt 50mm scope. I want to image as well as observe. I am thinking I could put my ZWO on the scope and capture video. My question is, does focal length in a solar scope relate to the FoV as it does for a non-solar scope? The field of view calculator (http://www.12dstring.me.uk/fovcalc.php) suggests I could just about get a full disc with a focal length of 350mm (the 50mm Lunt), but not with a focal length of 500mm (the 60mm Lunt). Is my logic correct?
I pointed my solar telescope at a small prominence in the hope that it would do something whilst I imaged it. Because I am new to solar imaging I don't know whether this is particularly lucky, or if it's something that's easily caught. Over the space of about an hour I captured 18 videos, each of 1000 frames, using a mono DMK21. I stacked 10% of the frames, and then manually went about aligning and cropping the 18 stacked images because ImPPG didn't like to do it for me. I also took an image of the solar surface, just to get rid of the white in the image, and add something visually interesting to the solar disc. I used a curves adjustment to make it orange, and then made a movie in MS Movie Maker.
Hope you enjoy it!
The Sun in Ha 21 Apr 2018
Absolutely crap seeing conditions... even the "blue" parts of the sky between the cloud gaps had a high haze.
Nice new active region (AR2706) with spots and a nice prominence showing a large detached section
Lunt LS60THa, ASI 1600MM camera and Sharpcap capture software
Prominences and nice large detached section
(haven't seen one that well detached before)
By Ama Noody
I have an LS35THa.
It has a single etalon with a 0.75 Angtrom bandwidth and a B600 blocking filter.
It's an £850 scope.
I was looking at "upgrading" to a Lunt 60mm
It has a single etalon with a 0.75 Angtrom bandwidth and a B600 blocking filter - Mmm... seems very familier...
I don't find the focuser on mine 35 doesn't, well, focus, and the image is sharp enough. Is its aperture, importantly, "small"? I've seen some amazing images in the 35mm, even from Lunt themselves. It seems that image processing is the most important aspect of any H-a scope.
What actual visual improvement will I get for a scope that's double the price, or even more expensive versions? I'm happy to buy - even an 80mm, if I am actually getting another £1000-£4000 of improvement but I don't need one just for the sake of it.