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I've been dabbling for about a year and am having a lot of fun.
Nothing too serious and I don't have mega expectations but I'm starting to wonder if my images could be sharper and there's something I'm missing.
I'm attaching a picture which is the best 10% of a 3 minute video with 500d 'bolted' straight to the 200p f5 scope. No filters...no barlows...just camera straight on.
It's sharpened and saturated after the fact so in every way this is the sharpest I can get it.
I've always had the same issue whether it's with a single shot, stacks of shots, or stacked video.
Views through the eyepieces (circle-T 12.5/25) are mega sharp!
I'm happy that collimation is very good and it was a remarkably clear night tonight.
All in all I'd be pretty happy with this image (maybe over exposed a bit...) if the craters with shadows didn't make me want to rub my eyes.
Thanks in advance for any thoughts or advice!
I am intending to buy a Sky-Watcher Skymax-127 Maksutov-Cassegrain, primarily to make a number of daytime photographic terrestrial observations ranging from 1-5.5 miles, the most distant of which is of a target at 5.5 miles that is about 5 feet in size. The distant target would have an angular size of about 0.01 degrees. To get an object of an angular size of 0.01 degrees to appear as 100pixels vertically on the APS-C sensor (22.3mm x 14.9 mm) of my Canon EOS 250D camera, I would need a telescope/lens with a focal length of about 2.1m. The Skymax 127 with a focal length of 1500mm is pretty close to the required value and if used in combination with a Barlow lens I would be able to get more than the focal length I require.
The FOV of the Skymax-127 with its 1500mm focal length in combination with the vertical sensor size of 14.9mm gives a field of view that can be derived from the following attached diagram
which gives a FOV of 0.569°.
But I would also like to make some lunar and solar observations with my system and capture images of the complete objects, and the maximum angular size of the Moon at perigee is 0.568°, so in theory the FOV of my system at 0.569 should be sufficient to gather the whole of the Moon at its largest angular size.
But I have seen a video in which someone is using a Celestron SE6, which also has a focal length of 1500mm and when using it with a Canon 60da camera with an ASP-C sensor https://www.dpreview.com/products/canon/slrs/canon_eos60da which has the same size sensor as mine, then the camera does not seem able to capture a full view of the Moon. The video is at https://www.all-startelescope.com/video/scope-setup/nexstar-6se-dslr . The section where the Canon 60da is used is just before the end of the video and a clipped moon is shown, and then a full sized sensor camera is used to capture the whole Moon.
Does this video not suggest that my camera with its APS-C sensor coupled with the Skymax 127 with its 1500mm focal length would not be able to capture the whole Moon, despite my calculations suggesting that it would?
I understand that a reducer does not work well with a Muksatov-Cassegrain, so if I buy this telescope and use it in conjunction with my Canon250D, am I doomed never to be able to get an image of the complete moon?
Thanks in advance for any suggestions/help etc
UPDATED ALL SOLD
I have too many Lunar Atlases, so it is time to say goodbye to some of them.
All of these book are in very good - excellent condition and have hardly been used. All prices are postage paid to the UK. Payment by Paypal please - details on request
1) Atlas of the Moon - Antonin Rukl 1996 published by Kalmback Publishing £25 Sold - Thanks John
2) Observing the Moon - Peter T. Wlasuk 2000 published by Springer £12 Sold - thanks James
3) The Hatfield SCT Lunar Atlas - edited by Jeremy Cook 2005 published by Springer £20 Sold - Thanks Vin
4) New Atlas of the Moon - Thierry Legault & Serge Brunier 2006 published by Firefly Books - note this is a large hard cover, spiral bound book £15 Sold - thanks James
5) Atlas of the Lunar Terminator - John E. Westfall 2000 published by Cambridge University Press £20 SOLD thanks Ade
Thanks for looking