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Equipment Discussions >> ATM, Optics and DIY Forum

Mike I. Jones
Carpal Tunnel

Reged: 07/02/06
Posts: 1571
Loc: Fort Worth TX

Re: How Good a Secondary is needed?
07/03/09 08:14 AM

OK Rob you got it - a fair swap for your very fine deflection analysis of my 24" tapered blank a while back. Which one of your scopes do you want analyzed? How bout that 43" megascope?

.... How far inside focus is your diagonal, and what diameter fully illuminated field?

I have initally assumed a 43" mirror radius of 344" (exactly f/4) and placed your diagonal 29" inside focus. For a 1" diameter fully illuminated FOV the diagonal is 8.25" x 11.668", in-plane offset 0.715", lateral offset 0.506" away from the focuser and toward the primary. Optical analysis next.

Mike

Post Extras

Entire thread
Subject	Posted by	Posted on
How Good a Secondary is needed?	gaz-in	07/02/09 04:49 PM
Re: How Good a Secondary is needed?	Mike I. Jones	07/03/09 11:00 AM
Re: How Good a Secondary is needed?	Mark Harry	07/03/09 01:09 PM
Re: How Good a Secondary is needed?	gaz-in	07/03/09 12:01 PM
Re: How Good a Secondary is needed?	bbasiaga	07/02/09 05:02 PM
Re: How Good a Secondary is needed?	llanitedave	07/02/09 06:40 PM
Re: How Good a Secondary is needed?	Bird	07/02/09 09:41 PM
Re: How Good a Secondary is needed?	Mike I. Jones	07/02/09 10:13 PM
Re: How Good a Secondary is needed?	Houdini	07/03/09 06:19 AM
Re: How Good a Secondary is needed?	Mike I. Jones	07/03/09 08:14 AM
Re: How Good a Secondary is needed?	Houdini	07/03/09 08:42 AM
Re: How Good a Secondary is needed?	jayscheuerle	07/03/09 10:52 AM
Re: How Good a Secondary is needed?	Mark Harry	07/03/09 07:28 AM
Re: How Good a Secondary is needed?	Mark Harry	07/03/09 07:34 AM
Re: How Good a Secondary is needed?	walt r	07/02/09 11:55 PM

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