(meteorobs) Rayxar X-ray lenses.

[Swift, Wesley]

	These lenses are designed to couple the green tube image to film or
a CCD detector.  They are designed for near unity conjugate (like enlarger
lenses) and only corrected for the green.   I would not expect great
performance with infinite conjugate (star like) meteors, especially with
detectors with a large red / IR sensitivity.   I wouldn't buy one of these
expensive lenses new, but if I had one or could get it cheep I would
certainly give it a try.  My favorite lenses are the Schneider "silicon APO"
f/0.95 lenses:  Nothing beats a sharp focus!

Wes


-----Original Message-----
From: meteorobs-bounces at meteorobs.org
[mailto:meteorobs-bounces at meteorobs.org] On Behalf Of David Entwistle
Sent: Sunday, August 28, 2005 11:07 AM
To: Global Meteor Observing Forum
Subject: Re: (meteorobs) Rayxar X-ray lenses.

In message <BF372770.3B3EF%epmajden at shaw.ca>, Ed Majden <epmajden at shaw.ca>
writes
>    Apparently someone at the Max Planck Institute is using or has 
>tried a 65mm f-0.75 Rayxar x-ray lens with an image intensifier for meteor
studies.
>Does anyone know who this is and how I can contact him/her?
>Thanks:
>
Ed,

It looks to be François du Toit. See 

http://home.intekom.com/franlet/

email address is on that site.

--
David Entwistle
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