Hello,
805 mm is too short for M57, but I tried it anyway.
Dets:
APO triplet refractor TMB 115/805 with dualspeed 3,5" Feather Touch focuser
Taken at F/7 without focal reducer
Canon EOS 300D modified
UV/IR Baader blocking filter
EQ-6 mount modified, Powerflex MTS-3SDI electronics
guided through Celestron 80/900 and webcam
6x3 min, 400 ASA
Radek
805 mm is too short for M57, but I tried it anyway.
Dets:
APO triplet refractor TMB 115/805 with dualspeed 3,5" Feather Touch focuser
Taken at F/7 without focal reducer
Canon EOS 300D modified
UV/IR Baader blocking filter
EQ-6 mount modified, Powerflex MTS-3SDI electronics
guided through Celestron 80/900 and webcam
6x3 min, 400 ASA
Radek
Attached Image: