I have a couple more questions about this, Ed. Are you going to post a prescription of the doublet specs?(after checking patents) Would this corrector work...
Thanks for creating this place, Mike. We are all indepted to you. Looks like there's some interesting stuff going on already, with F/3s and correctors! Mark...
Yes Mike, Now you could really jump in with two feet and say you will work on one of the foamglas mirrors so we can all see how it turns out :_)))))))) Drew...
Mark, You're very welcome. No debt is owed. I'm just trying to put out a good product, expand the range of acceptable focal ratios, make mirrors that cool in...
Mike, Yeah we kinda do owe you for this, at least I do. You've helped me some on CN (BTW I'm Biff). I've only been into telescopes a for about 2 1/2 years and...
Ok, this is my follow-up on a discussion with Al Nagler at Tele Vue last fall about revising the ParaCorr for faster applications. I've looked for my notes but...
I know you have pushed the envelope with this F/3 venture. Can I ask if the intended goal is as a general multi-purpose visual/imaging that's super compact? If...
I'm wondering about a few details in your conversation. ************ We are thinking about mirrors on the short side of F/3-4. It looks like we need a coma...
Mark, ... The goal is to give the same quality of visual image as slower telescopes over most of the field, while being more compact and providing shorter...
Mark, The "Paracorr like" is 2 inches from focus similar to Televiews paracorr which is about 45 mm from focus I've heard. Ed ... flat, ... 2" ... solution ......
Mike, I have to go with recomending dedicated scopes for each task. What makes a scope good for viewing ( keeping the system light and portable, putting the...
Andrew, ... Good points - let me clarify - when I say imaging I'm talking about high sensitivity cameras like the Stellacam or Mallincam which are taking under...
It is very apparent that members of this group are very knowledgeable, experienced observers, with technical competence thrown in. I am sure many of you have...
Something that I think will be important with the F3 and 3.3 scopes is having plenty of in-focus for focusing the Mallincam or Stellacam. With the F 3.3 mirror...
Duane, Â I think Drizzle software helps to correct for field rotation. There are also areas of the sky where field rotation is at a minimum. I think I have...
My name is Bob Kirschenmann and I've finally gotten around to joining this group. I have a bit of background in fabricating optics, telescope components, and...
Hi Bob................ hope you are not freezzeeeing up there :_))))))) We will be grilling burgers on Friday night so if you want to head south and join us...
Hi Drew,  As a matter of fact...I am freeeeeezing. Just came in from closing up the Bobservatory and had a cup of hot tea to thaw out. Not real bad out,...
Mark, I tried to forward some stuff to your "mdhopt..." Yahoo email but it wouldn't take it, so I hope the questions got answered. ... This is true except for...
... ***************************************** This might have been an experimental failure, simply because the degree of correction, like the astrograph...
Thinking about it some more, the SA Mel spoke of could be addressed by "bending" the corrector achromats. One possibility. The astrograph design works with 2...
"You can ask directly, certainly. There didn't seem to be anything to it _other_ than making the mirror to a different conic. But I wouldn't want to lock a...
Mark wrote: "Mel Bartels just recently discussed his experience with a 13" f/3 and ParraCorr testing he did on the ATM list. He says, counterintuitive as it...
but if the paracorr is expecting an SA3 corrected ... gave "interesting" results ... So do you think it plausible that an area of compromise could be found...
... (?) ... What happens with a corrector is that when you try and correct for coma, without adding so much astigmatism that you destroy the image that way, is...
Yes, if the corrector could achieve higher performance by using a conic other than -1 and it was a permanent part of the OTA. No, if a new corrector design...
It also obviously matters what the spacing is - Mel said he was using it at the maximum out, and Al mentioned several things about adjusting the spacing, which...
Interesting - what kind of hyperbolic coefficients would make this work for the test examples? It's not _that_ hard to build it in, up to a point obviously,...
The reason I mentioned it, was the forementioned Rosin astrograph. The hype enabled Mike to design the corrector to lie about 2-2.5" inside focus, and only...
