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Dear Group Members, As our informal Alt Az Initative group has gotten larger, there have been a number of requests that a web site be established for basic...
Hello: Hi Mike I really enjoyed meeting you in person, and seeing your active primary mirror in action. It really works and works well! We discussed the...
Hello: Hi Mike I really enjoyed meeting you in person, and seeing your active primary mirror in action. It really works and works well! We discussed the...
Peter John Smith did a CDK design or two for me in '98. I've decided to go with a classical Cas. design for my 20" 1) variable Fl 2) prime focus 3) good...
Hello: What f-ratio will your primary mirror and final system be? How big will your secondary be? I've been debating myself between a corrected (or perhaps...
Hi David, I have not heard anyone mention this material. It does not seem to be something that is very readily available. Andrew has mentioned silicon ...
Mike, If that's directed at me, the primary is 20" at about f/3.5 and the secondary may be anything from 4" to 8" in diameter. The doublet on a CDK isn't too...
Hi Richard, Thanks for the heads up on the PI line of products. The easiest way to order their catalog is to call Donn Silberman at 949 679 9191 at their...
I commented to Russ that it looked almost exactly like the 2.5m design I have been working on. Of course I give huge credit to the Alt-Az group for helping...
I'd love to read the full article and see the design but I'm not up to paying for a subscription to the publications of the Astronomical Society of the...
Olivier Guyon Subaru / NAOJ Hi Olivier, I enjoyed our chat on the phone. As a professional astronomer with amateur telescope making and small telescope...
Hi Terry and Lisa (and Kiran and Andrew), I'm very interested in hearing more about possibilities for making the spin-cast epoxy mirrors lighter. As your...
Terry, Russ and Lisa....... and all, I got a crazy idea. What if we pull a page from Dr Peter Chen and think about a filler material. I was toying with...
Hi Russ, Hi Lisa, I haven’t forgotten about the adhesives, although I did forget to call you last week due to exam grading. Sorry about that! No problem...
Hi Lisa, Very good input. Thanks. Sounds like you may want to separate the question of perhaps a somewhat thin and maybe even meniscus (even thickness)...
Hi Drew, These sound like good possibilities. Silicone II would be the right price. Lisa mentioned Teflon as a possibility. I suppose one could take the...
Russ, Hi Terry, You have a great sense of what is needed her for a successful mirror. Thanks for your kind words. Actually I'm a bit of a mirror dummy,...
Wow................... Never thought of any of these things. What a team this is. I am sure foamglas is the backing solution to whatever surface material is...
Hi Howard, Glen, Craig, Mel, Gray, John, Dave, and Mike^2, Howard asked for a copy of the paper which is attached. This is a paper received October 2008....
Russ, A lot of progress has been made in the past week. Short version is that are a lot of variables and no one seems to have done a good job in describing...
Russ Hi Greg and All, I'd really like to pursue this further. There is some common ground between what one could call an "image stabilization" system (that...
Russ, If needed, I think it makes a lot of sense to do some sort of "fast" steering with the average fed back to the main tracking system. It's just a lot...
Hello: I was looking around for information about aerial camera lenses used in spy planes (probably good for astrophotography), and found an interesting...
There's the 64 dollar question, what happened to that technology? Probably still classified. Russ, you contacts at the Skunk Works? I wonder how it was...
Baker is a well respected name in wide field high resolution optics (Nunn-Backer camera in the reflective optics book). I've suspected for a while that the...
Scheduled Maintenance:
We are undertaking some essential, but extensive maintenance to improve Yahoo!
Calendar. Your Group Calendar is being migrated to a much improved version of
Yahoo! Calendar. During the maintenance period, you may not have access to your
Groups Calendar.
We sincerely apologize for this inconvenience. Your Groups Calendar is in great
shape and we are working to have it available again as quickly as possible
- Yahoo! Groups & Yahoo! Calendar Team
