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Nice work Alex, especially for afocal (camera and lens held to eyepiece) astro photography.
It seems that the design of most Newtonian type telescopes causes problems with not enough inward focus travel. Some people get around this by purchasing a low profile focuser and low profile camera adapter, or by moving the Primary mirror further up the tube, so that the light cone projects further out of the tube at the eyepiece end, although the secondary mirror may then “miss” some of the light cone.
Cheers
Dennis
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