spiderless : Message: Re: How to shorten F.L & widen field on 6" Schief

spiderless · Unobstructed telescopes

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How to shorten F.L & widen field on 6" Schief

Message #22 of 1072 |

Re: How to shorten F.L & widen field on 6" Schief

I guess I hadn't posted the 4 inch f/10 CHief (thought I did). Anyway
it's posted, check it out. Very simple off-the-shelf design.

Wed Feb 6, 2008 1:36 am

"Ed Jones" <opticsed@...>

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Message #22 of 1072 |

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I've almost finished my current project, an 8" F/6.25. I have over a half dozen other ATM projects to choose from. One of them involves making a lighter,...	artbianconi	Feb 4, 2008 2:34 am
I Managed to find a string at Cloudy nights where Mark Harry addressed this problem. The consensus was that it can't be done given the pre-existing optical...	artbianconi	Feb 5, 2008 8:07 pm
... Art, The Schief has a naturally long focal length and high f number. I don't think it will be likely that an off-the-shelf lens to do what you want. You...	Ed Jones opticsed	Feb 6, 2008 1:19 am
I guess I hadn't posted the 4 inch f/10 CHief (thought I did). Anyway it's posted, check it out. Very simple off-the-shelf design....	Ed Jones opticsed	Feb 6, 2008 1:36 am
Hi Ed!. I AM rebuilding the Schief! The cradle is overbuilt and thus overweight. It's getting a far better design made from low density structural foam and...	artbianconi	Feb 6, 2008 3:21 pm
Art, No you can't use your comvex secondary, a Yolo needs a concave secondary which you'll have to make and I would need to design. I would really recommend...	Ed Jones opticsed	Feb 6, 2008 3:46 pm