-DannyMy warehouseMy Channel
Quote:and your using effective radius as opposed to inside/outside?this is what I got from you numbers.
Quote:Isn't that the center of a mask aperture or exact pin location?
Quote:I must be a dummy. Calculating r^2/2R gives me about 80% smaller readings. Why didn't I just do it the old way and skip the software?
Mike Lockwood - Owner, Lockwood Custom Optics. 20" F/3 MX Starmaster, 14.5" F/2.55 self-built Newt., nine self-built scopes, 4.25" to 30" http://www.Loptics.com/
Quote:So, why do my entered measurements of .250" and .226", respectively, in my 3 programs result in such a marvelous wavefront chart?
Quote:My Caustic measurements were rough, (x= +/- .0005), but confirmed significant overcorrection. Star test showed earlier secondary shadow breakout outside focus at 540X. I'm missing something here in the software.
Quote:Made a Couder screen, tested it, 4 sets of measurements...overcorrected by 1/5.4 p-v.
Quote:Thanks all for the feedback. I was hoping that someone would say, "oh yeah, these 3 programs can't calculate pinstick setups...use paper and pencil only."
Quote:Obviously, I don't know how to put the numbers into XP correctly because of the discrepancy in the "ideal figures" column, yet got great wave shape. Screwed up on v2.0B, and ZONE.exe is wrong somehow.Flummoxed.
Quote:"If they all agree to reasonable accuracy, I'd be suspicious of the star testing results."Or the coater's 1/3 wave .73 strehl test? Will this ever end?
Quote: Supposed to be a hobby, not an obsession.
10"f5.3 Newt (homemade) 8"f6 (hm)8"f7.5 (M Harry mirror) 6" f8 Newt (hm) 2 4.25"f11 Edmund newts. 4.25" Schief (hm) 5" D&G Refractor 5"Celestron MakCass, 6" MakNewt Intes optics,6" f10 MakCass Intes optics several small refractors 90mm, 80mm, 60mm
Quote:Sorry, dumb question. When you place the shadow, is it centered (equal brightness) on the pin or in the space between the pins?
Quote:thats similar to autocollimation. no numbers.
Quote:you need to drive it to delmarva this weekend as a walkin, what is it $25 and have steve look at it in his rossnull.