Re: [ATM] Edmund Optics "Techspec" brand achromat: suitable lensfor small refractor?

[Richard <cnc@cncservo.co.uk>]

Hi David,

Tuesday, August 21, 2007, 7:00:50 AM, you wrote:

DW> I note from the photo shown that it appears to be designed to be 
DW> installed as an air-spaced lens,

Surplus Shed support is pretty good. As was pointed out to me
yesterday, I seem to have somewhat exaggerated the demise of Jaegers
who are still alive and kicking at http://www.ajaegers.com/ so if
surplus shed don't know then Jaegers certainly should.

If all else fails, you'll have to measure or discover the four radii
and the glass types, plug them into and optics program like Zemax or
OSLO, leave the airgap as a variable and optimise the design.

-- 

Best regards,
  Richard in the UK

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