My monocular arrived today, man this thing it ***TINY***. A couple of cool things I noted which probably is obvious to others. As I focus in on an object if I...
Mitch, That does look to be a very nice scope for use as a tester scope. I think I will get one of those things too. You might consider what you have said...
... I think I ... Indeed this ***little*** guy should do quite well. ... If you ... advantage. ... much range ... to be ... a fairly ... I may get a camera set...
I am nearly finished with my new Focuault tester but I have hit the same snag I did on my last one. Those darn little "V" blocks for the stage to slide along...
... Mitch, I made the 'V' blocks on mine out of two pieces of 3/4" aluminum channel from HD (or Lowes, or Ace, or...) held in with screws. These are laid out...
... hit ... for ... cut ... of ... I was thinking that. I used 3/4" copper polished super smooth by rigging it up to a drill and spinning it against a brillow...
V blocks? I took a length of delrin cylinder, split it lengthwise so I have 2 halves. U U . They are epoxied to the base of the foucault tester. Do it again,...
... I mounted them with the edges against the wood with the apexes up. Simply drill a hole through the apex (from the inside it's easy) and use a long screw to...
... I ... Not a bad idea. Accurately splitting a small Delrin cylinder lengthwise would seem to be problematic, though, with just hand tools, maybe a drill...
Hi all, First to introduce my self, I'm Vimal. M. From Mumbai (India) and I'm interested in ATM very much. Currently I'm working on 6" f/8 and 15" f/5. One of...
My advice would be to finish at least one of the projects you already have going first before deciding what is next. Unless you just like to grind glass....
My suggestion would be to go for the CC. As you suggested the Dall ends up being a very restrictive scope being f/15 to f/20. A major advantage of the CC...
... staff.beckman.uiuc.edu/~melockwo/mirror_making/foc_testers/foc_testers.h tml ... I don't have the capability to cut the wooden angled pieces, hence the...
Hi Mitch, I can think of a couple of ways: drill a half-circle slightly smaller than the pipe. That way only the edges of the hole will ride on the pipe. Then...
Hello, ... preferably around 12" or 14" diameter. Anybody with previous experience on the same, pls. tell us which design to go for out of the three? ... &...
Hi Mitch ... What about scavaging a orange or tomatoes box? Here in Europe they can be found in (rough) wooden boxes, which corners are fastened with angled...
Hi, I was wondering if there is a real reason why we use to make circular mirrors. Cutting a circular shape is one degree of complexity above cutting an...
Ricardo, ... I put three graphics in Files/Steve Koehler. octagon_star_test.png shows a simulated star test for a perfect octagonal mirror. The in focus star...
Well, the segments of the large mirrors such as the Hobby-Eberly telescope at McDonald observatory in Texas are hexagonal in shape, but I don't know if they...
... advice. ... Very resourceful! I had not even thought of that, they would be very close to what I need I think. We might have one lying around the ...
... circular mirrors. ... an octogonal shape with straight line cuts on glass with a regular diamond saw tile cutter. ... circle area will help to avoid TDE,...
... smaller than the pipe. That way only the edges of the hole will ride on the pipe. Then you can flatten the corners and add teflon. Tried it, no bit is...
Look at Mike Lockwoods #1 tester. You can see two v ways cut into thick sheet brass. Brass on steal is a very good smooth bearing. Or else use this stuff: ...
Look for 3/8 to 1/2 inch diameter round plastic feet in the hardware store. They usually have a slight tapered shape and have a screw in the middle to attach...
One way to eliminate the torking is to apply the pushing force just about the pipe. I'm surprised nobody has talked about that yet. Dale Eason ... hit ... ...
