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:Mike, I checked that scope out at Okie-Tex and it is indeed a wonderful telescope. I looked at Mr. Pratt's web page, but didn't see any pricing information. Do you know what it costs?
Quote:The optics are made by me, and we worked together to develop the mirror cell,testing the mirror in the cell for the purpose of tweaking the edge support forbest performance.This paid big dividends - with my optics and John's mechanics, the telescopeperformed superbly. It is probably the best 25" telescope I've seen to date, interms of aesthetics and performance.
Quote:I've posted an article about a recent trip that I made to the Warren Rupp Observatory near Mansfield, OH. I recently made a new 36" f/6.3 mirror for the telescope there.http://www.loptics.com/articles/HH2012/HH2012.htmlHope you enjoy the article and photos.
Jim Fly - Manufacturer
Quote:VERY NICE Pics, Mike!I'm guessing that the long focal length calls for a beam and Barlowed laser for the axial alignments, yes?
Home-built Newt: 10" f/4.5 Royce conical primary, Skywatcher NEQ6 (Astrotroniks tuned) iEQ45, Duo-T, 8" f/4 Skywatcher Quattro CF 120 ED f/7.5 Skywatcher Black Diamond 80ED Stellarvue
Quote:After much thought and work and some input from friends and colleagues, I have completed the first version of my Projects Page. No doubt it will be updated quite a bit in the future.You can find it linked from the front page, or directly here: http://www.loptics.com/projects/projects.htmlAs I put it together and went through my list of completed mirrors to select appropriate examples (the projects page is NOT all-inclusive), I was a bit shocked at just how much I had gotten done in the last ~5 years.
Quote:Bob,It's good to see that John Pratte is getting some of the recognition he deserves. I own one of his Sweet Sixteen 16" f/4 Dobs and it is a wonderful instrument. I am sure you will be happy with your scope.Bill Meyers
I lost count of my scopes. Now I just want mobility. I came, I saw, I bought some interesting accessories, and put names to faces: NEAF 2012, ASAE 2012, SWAP 2013, ASAE 2013.
Quote:The 1 meter class mirrors you are working on are quite interesting. For the moment this is idle curiosity, but how fast could you make a 40" mirror?-Rich
"You're not afraid of the dark, are you?" - Riddick "The best scientists are humble. They seek to understand, not to ensure their legacy, but merely to understand." - Mori
Being satisfied with what we already have is a magical golden key
to being alive in a full, unrestricted and inspired way " -- P.Chodrön
My small astronomy tools:
Quote:I like that 30" prime focus design. I've wondered why that hasn't become more popular - with CCD cameras around 4"-5" in diameter, it seems like an obvious way to get a nice wide field camera with 100% field illumination while keeping CO down well under 20% in scopes of 20" or larger, not to mention simpler collimation and fewer reflective surfaces.Jarad
George N Obsession 20 Optical Guidance Systems 10" F/9 R-C Cass 6" F/5 & 8" F/8 home-made Newts Explore Scientific 127mm ED MI-250 mount Denk II bino-viewer, with PowerX and Newt reducer, Member, International Dark-Sky Association
Money can't buy happiness, but it sure makes living with misery a lot easier!
Home-built Dob 10 F6/Zambuto/Osypowski Platform Starmaster 7 Oak Classic- Zambuto Discmount DM-4 w encoders Stellarvue 80ED Stellarvue 70ED Stellarvue 60 Finder Tasco 50 refractor (1966 birthday gift) Orion 80ST Lunt 60 Double Stack Bogen with Dwarfstar mount AT Voyager mount Celestron SLT mount Astro Physics 15x70 Binos Orion Parallelogram mount
Scopes: 10" dob, 13" dob, 4" refractor
"Only gold is money, and nothing else. " - John Pierpont Morgan
Quote:That is my dream scope right there. 20 inches and seated - Lord Rosse would wet himself.