Greg, I bought a cheap powder coat sytem to fool around and see what it's like. I am very pleased with the results so far. The finish is very durable. I took a...
somebody have a good web site to explain how it work from optic way or how they desing it like this it alway be curious to untherstand it the optic path and...
We are about to start a mirror making class in Eugene Oregon. There will be 12 sessions, once a week. We have an interesting variety of projects including a...
Dear Mel Bartels, I really appreciate if videos of the mirror making class may please be recorded & uploaded for those who cant attend the Class... Â Nazim...
... For a cemented ECO doublet, I'm also kind of partial to the N-BK7/N-SF5 pair: Title: dbl04-11x f/12 Doublet Surf Radius Thickness Glass Diameter ...
... Although, I think a better one was suggested by Ian Robinson in discussions last year (adapted): Title: dbl04-33x 125 mm f/12 doublet Surf Radius...
Donald, Very interesting focuser indeed. Don't be too modest to give the URL <http://www.clementfocuser.com/>. Does Zeiss carry it? How much does it weigh? Al...
Man Mel...I'd love to attend that class....but I live in Bremerton Wa, and am unable at this time. I'm working on a 17"x1" float plate glass mirror currently...
I own some professional woodworking equipment, in this case a 5hp cabinet table saw and a 8" six foot long jointer. Both of them have flat machined surfaces. ...
... I own some professional woodworking equipment, in this case a 5hp cabinet table saw and a 8" six foot long jointer. Both of them have flat machined...
As Mel says probably not, however something that you might be able to scrounge that is close, is a sink cut out from a granite counter top, these usually are...
Try to find the glass platen out of a copier. An old light lens type is probably best if you can find it. The tech reps toss them if they have a scratch. ...
Would something like this be flat enough? http://tinyurl.com/bmubdd This granite block for $20 would be very good base for Bath interferometer. Not its...
Greg, It's better to "zero" your spherometer on a known radius of curvature, a mirror of known focal length. Then you can better test all these "flat" ideas. ...
... I zeroed mine on a precision flat at work and locked it down. It has worked well for me but then I'm not trying to hit focal lengths to within 1mm....
New, granite tombstones aren't certified, but the manufacturing process leaves them about as flat ah a Grizzly or Harbor Freight surface plate. If you can...
I have my hands full leading the class - we're over a dozen people starting at various points in the process with different mirror sizes. If someone comes...
... What exactly this number refers to? To the small part of the flat, or you have measured the whole thing by shifting spherometer around. If this was the...
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