Bill, Just a random thought here (in tune with Jerry), but why exactly would you /want/ to use an auxiliary scope with an f/4.6 mirror? All mirrors of the...
In designing my tester,I used several designs as examples as I planned to build mine. I liked Mitchell's monocular, in Berry's book he uses a small scope, and...
The real question is, why not? Many people have told me it's not really necesary. These people usually have a camera setup though :) I have very bad vision...
Well I guess I can understand using a scope so you can see the mirror. I use the old mark 4 eyeball for testing. My eyes are good except at reading distance....
Bill, Nothing wrong with an auxiliary scope on the tester, plenty of people have used them. Didn't mean to be down on what you built - I've never tried a...
Mitch, Even though I'm building a high-res video based analysis system, there's something extremely cool about having only one optical surface in the system...
... My vision was 20/100 a few months ago without glasses. Things start to get nticably blurry about 3-4 feet in front of me. I notice it even on the computer...
... Looks like the one I bought from Edmund in 1974 for about 10.00. The knife edge just slides on the base board. High tech stuff. Being stubborn is a good...
I have an old 6" F/8 edmunds but check this one out! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=200096265428 I would take this in a heart beat but...
I have an old 6" F/8 edmunds but check this one out! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=200096265428 I would take this in a heart beat but...
Looking for a mirror blank made of very high quality glass (excluding plate glass), 21 to 23 inch dia., 1.5 to 2 inch thick. Can have imperfections in the...
... That is a classic beast and F6 gives a nice wide field of view, but I am willing to bet, based on your Ronchigram, that your 6 inch F6.5 will out perform...
... will ... Your kind words are flatering. But I wouldn't put all my money on it, my Edmunds 6" F/8 is 1/25 P-V Wave Front. My 6" F/6.5 is "only" 1/12.5 P-V...
No. They installed the telescope backwards on the finder. ... From: atm_free@yahoogroups.com [mailto:atm_free@yahoogroups.com] On Behalf Of John Pinkham Sent:...
I have searched multiple archives and the web and have not found sources for Kydex for my (to be built) secondary cage. Well, that's not entirely true. I...
... You might want to try abs plastic. It comes in black and you can get it with one side textured. What worked for me was to sand the untextured side giving...
Hi Barry-- I have a source but I have to find the receipt. Also, there are many different types of Kydex. Do you know specifically what you're after? ... ...
... Kydex, SHMYDEX, It's just plastic, usually black with a matte finish. KYDEX is a brand name. Made famous by Richard Berry's book. You can use just about...
There are many good substitutes for Kydex but if that's what you really want to use, Meridian has it... http://www.meridiantelescopes.com/ebonystar.htm Scroll...
Kydex is used in pallet shipping, I have picked it up for free by stores as Home Depot since sometimes it is trashed, and sometimes returned to the shipper,...
... Well, it gets down to freezing in Yuma, Az where I built that scope. Had to warm it up a bit to make it easier to roll it to the 15 inch diameter but...
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