A 58mm tube is used instead of a 42mm tube which I previously acquired, to avoid any vignetting. A M42 to EOS EF ring with electronic focus confirm is used, it is glued together to ensure proper orientation of the tripod socket.
Welcome to my astronomy blog, I dedicate myself to the simplest form of amateur astronomy which requires only portable equipment. I have two small refractors, two small binoculars, one small GOTO mount and another small equatorial mount, and a small H-alpha solar filter. Originally from a city where the people were proud of their light pollution, that is Hong Kong where I loved. Relocated to the UK since 2021.
Friday, May 08, 2015
Final form of the converted Canon FD 300mm 2.8 in EOS EF mount
This is the adapter used. It consists of a 77-58mm step down ring, and then a 58mm focusing tube, plus a 58-42mm step down ring. The flange distance is then adjustable to suit different situations.
A 58mm tube is used instead of a 42mm tube which I previously acquired, to avoid any vignetting. A M42 to EOS EF ring with electronic focus confirm is used, it is glued together to ensure proper orientation of the tripod socket.
A 58mm tube is used instead of a 42mm tube which I previously acquired, to avoid any vignetting. A M42 to EOS EF ring with electronic focus confirm is used, it is glued together to ensure proper orientation of the tripod socket.
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