TSA 120 /Starstructure 14.5" f/4.42 with Terry Ostahowski's All Quartz Optics
Quote:Suggest you look at what the baffle tube diameter is which is reported to be 2.1" Now treat that as a 2.1"field stop 14" or so inches in front of the eyepiece. You will find that you edge illumination is exactly 0 for the 3" 30.... Sorry to be the bearer of bad news. The visual back opening on large cats is irrelevant, its the baffle tube that counts.
A 60mm department store refractor started it all....
Shneor 22" f/4 Sayre Monocular Tom Osypowski Equatorial Platform (since 1995) Assorted small telescopes, 76-152mm; 25mm ES100°, 20mm ES100°, 13mm Ethos, 9mm ES120° (serial #18), 9mm ES100°, 8mm Delos, 6mm Ethos, 4.7mm Ethos, 3.7mm Ethos SX, 2.5mm Nagler Type 6, 2" 2X Powermate, 2" 1.5X Proxima Barlow, 2" GSO Coma Corrector, 18mm BCO, 10mm BCO, 6mm BCO and other 1.25" eyepieces. Zhumell 8x42 Nova Phase-coated ED Binoculars Burgess 25x100 Binoculars
//Anders 8" EdgeHD Skywatcher Equinox 120 Pro 80mm f/6 TS triplet APO
Quote:I wonder if this would work well on a Meade 16" SCT?