Hey Ed, Is the max mirror size that will work with a 2" lens set determined by the solely the diameter, or is the focal ratio also a factor. For example,...
John, As the mirror focal length gets longer then the size of a half degree field gets bigger and 2 inch lenses start restricting the field and that's the main...
Hi Ed! I visited the Chief web site and saw this: "Field tilt is less than 2 degrees and is better than many other Schiefspieglers". It's certainly better than...
Art, The field tilt in the Chief is 2 degrees or less and I've never seen it visually at the eyepiece and I've looked for it. For a CCD camera it very well...
I'm finally getting high speed internet and changing my ISP. I updated my web page and it is now at http://home.fuse.net/eljones/ check it out. Also I will be...
Ed/Gary- Works fine on Mozilla Firefox... lots of new info on your page, Ed- nice to see! Nice to see a barndoor tracker.... several times I've seen people...
I am going to build a 12.5" F8 Chiefspiegler using the basic geometry you used for your 12" F7. I already have the mirror. Eventually, I will likely integrate...
Ed cautioned me to expect a delay when ordering the lens for my 12.5" F-8 CHief. His caveate was appropriate: Opto-Sign\ma has quoated a 4 week delivery for a...
hi art can you buy both of your lens ? how big ? thanks good fun kevin ... From: Art Bianconi <artbianconi@...> Subject: [spiderless] Expect delay in...
Hi Kevin! At Ed's suggestion, I am using a 100mm 1/10th wave flat from Surplus Shed so I can lower the height of the optical ladder when building the Chief...
HIÂ ARTÂ / great will like to hear how it turns out /Â kevin ... From: Art Bianconi <artbianconi@...> Subject: Re: [spiderless] Digest Number 98 To:...
Other lens companies are often slow too. My last order to Melles Griot was back ordered 6 weeks. Edmunds is probably the exception, they usually ship pretty...
I was playing around with Zemax to see if I could find a easy way to remove coma and I did. By making the primary hyperbolic I was able to mantain a very good...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the spiderless group. File : /Coma free...
spiderless@yahoogroup...
Feb 8, 2009 5:34 pm
279
If you use a hyperbolic primary and ED glass then you can make this coma-free Chief I just posted. It uses an f/6 hyperbolic primary but the correctors make...
hi ed thanks for the info / as you know i am polishing a 20 in f 8 for a chief it is cool testing at 320 inches / i also have a 12 f7 that someone could use...
Hi, Ed and Others. I'm new to the list, and just wanted to say how fabulous this new corrector is! Anyway, I see that people have applied it to two-mirror TCTs...
The work I am doing at PPPL has virtually wiped out discretionary time. My ATM projects have suffered as a result. However, I have ordered the requisite panels...
Art- What ever happened to the drawings you were going to produce for the forum? Or are you going ahead and building without them? Couple of other points: 1)...
Roger, I was hoping that the post to the ATM list that I made last weekend about Ed's Spiderless mailing list would attract some of the can do, will do people...
Hi, Randy. You're too kind to me, but thanks. Like you I just do this stuff for fun and fascination. The Ed-Corrector really does marvelous things, and Dick...
Hi, All. I added my file: 8in f/15 Schief plus Corrector, but I see now that this just reproduces work Ed already did. Sorry about that. Anyway, I'll leave...
Hi All, What I would really like to see is a couple of equations for calculating the corrector for those of use without Zemax. I use OSLO EDU. This way we can...
Hi Roger! Welcome to spiderless. Yes the correctors work on all three groups of TCT; schiefs, Yolos and Herschelians. I guess it would work with a lot of the...
Hi, Ed. Yes, that is a surprise. Probably no practical advantage in a 3-mirror for ATMs. Just of interest to raytracers. Cheers, Roger PS Sorry, Dave. I...
Hi, Ed. I looked at the Jolo. Very nice corrections! It is also possible to throw the second reflection on the other side of the mirror and use your doublet....
Are there any observers' reports of looking through a Chief? Wondering how well these work out in practice. You can write my off-list. Cheers and thanks, ...
Hi Roger, Yes the correctors do not do anything for spherical aberration or coma unlike the Maksutov-Herschelian or Dick Buchroeders CHT. They only fix the...
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