... the OTI scopes and they ... Quantum ... I also understood that Cumberland did the optics for both the Questar and OTI scopes. According to the Cumberland...
I added two pictures of an alt-az mount I made for a 4" refractor. It is made of 1/2" brass, and both altitude and azimuth are easy to move and very smooth....
it was got by reading out the interferometrical testing with sofrtwar, as it shall be done thanks Markus ... From: Wayne G To: Refractors@yahoogroups.com Sent:...
Jon; Good looking setup. What diameter tube is it designed to clamp? Looks a bit low for use with a longer focus antique refractor unless the legs extend...
... that ... There ... ANYONE can test their scope's optics and find out what is the PV, RMS and Strehl ratio. All you need is a 16 bit CCD camera, take two...
... What would be the least expensive route to getting a suitable 16 bit CCD camera? A friend has one, but is not inclined to take it off his observatory...
... bit CCD ... observatory imaging ... Alan, The Atik 16IC is 16 bit and costs $645 from AVA. Don't know if there are any less expensive. Thanks, Tom Davis...
... The DSI's tout they have a 16 bit A/D converter. Frankly, I don't know enough about imaging to know if that would work or not, but it's worth looking...
... You need a 16 bit Fits image for the software to work. It will not recognize any other image type. The software was originally developed for active...
Although this question does not relate to astronomy viewing, there is many brilliant optical minds here, so ..... Has anyone seen an optical product that can...
Alan, The Meade DSI Pro for $129 is the best bang for the buck, but the supplies are going fast. Check with Astronomics or OPT. Don ... From: "Alan French"...
... <astronut1001@...> wrote: For Baader's 40th anniversary Alpine Astronomical is having a $20 off sale on the fixed focal length Baader Hyperion eyepieces,...
... to be ... no ... optics ... in ... Not ... optics ... Hi Rich. If yourself or a learned associate know which optics SV makes "in house" for any of their...
... ____________________________________________________________________________________ Looking for a deal? Find great prices on flights and hotels with...
... Although it does make me wonder if it cannot be mimicked using three mirrors -- one parallel to the optical axis and two tilted from parallel by +/-7.5...
Hi Rick, yep, sorry I called it a "dovetail" prims....but a dove prism will rotate the image plane, but the abberations will probably be too much to...
Ron Thanks for sharing your experience with the Newtonians. The main mirror of a Nextonian should have less dewing problems than a well shielded refractor....
Clive; Strictly guesses but I suspect, based on posted comments on the SV group, that some prototypes have been done in house and per something I remember...
... As I thought, I have simulated this in ZEMAX with three mirrors. It does appear to correctly rotate the image. The question is "How big are the mirrors to...
Bill; A Dove prism is also a sizeable chunk of glass with a long light path through it. That could eat up a lot of back focus, maybe too much, in your...
Checks of Anacortes,Astronomics OPT, HOO and High Point web sites indicate that they are all sold out on the Meade sale DSI cameras. If any one finds a dealer...
... I keep trying to imagine this layout.... I hate to dismiss it, just because I don't fully understand what you are suggesting... Can you describe it a...
... With the moderator's permission (I hope), I put it in directory rflrs, file dbl02-88.bmp. I used a simple f/12 doublet for the objective, but clipped the...
... Scott, The mirrors in our 16" bino-scope are wide open to the sky with only 12" skirt surrounding each of them, this certainly is less shield than a...
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