AD10, NoName8, DS-16 with Spooner primary.
ES, Sterling, Parks, Baader, TV, GSO EP's and a lone Nagler.
Nikon, Celestron binos
20 inch f8 Chief Ed Jones designed and a 17 f9 Zanbuto Wide Band Chief Mike Jones designed .Both unobstructed telescopes .
-DannyMy warehouseMy Channel
Quote:I'm thinking a camera setup (attached to the focuser body and not the drawtube) would aid in the image interpretation, yes?
Quote:The lower left quadrant looks suspect to me.
Quote:Another couple reality-check questions for the experienced Ronchi testers. Last night, TDE was very visible in the outfocus, but not nearly so much in the infocus. Is that as it should be?
And if the lines start their "turn" say 10% of the radius from the edge, I can translate that proportionally into the size of edge mask required to hide it?
I am from New Zealand under nice dark southern hemi-sphere skies.Been in and out of astronomy and telescope making for 50 years now. Slogan: The heavens declare the glory of God. Scopes: 6" f6.5 Newt. 14" f5.09 Hubble Optics powered Dob. 25.2" f4.68 Strut Dob.(Home grown primary) Eyepieces. ES82 30mm,24mm,11mm 8.8mm.TV Nagler 20mm type 2.TV Plossl 7.4mm.Some GSO eyepieces and barlows. WO Binoviewers.
Orion XT12g, Resolux 15x70, Resolux 10x50
TeleVue NP101is, Nagler 31, Ethos 21/13, Delos 10/8/6, Plossl 15x2, Powermate, SIPS
Denkmeier BinoTron-27, D21x2
Baader, Lumicon, DGM Filters
Quote:I just received my Ronchi eye piece
Quote:cut a small piece of the 250 and glue it to the inside cover of a 35mm film container...of course after you had drilled a 3/8 hole.you can also lay a piece of white artist tape across half the focuser and use it as a knife edge.