Lens Problems ? (3)

["dave garnett" <dave.garnett@metapurple.co.uk>]

Tom,
Having looked at  the lens design fairly closely last time, my first
reaction is to assume that the problems lie elsewhere - the optical design
looks pretty good, the mechanical design (which I have never actually seen
in the flesh !) perhaps less so.

.Randomly hacking the lenses is unlikely to improve their performance. It
might be worth taking one apart to ensure that it is actually made to spec
after the reversal problems of last time.

I cannot help if  I don't have a clearer understanding of the whole of the
problem - what errors you are seeing, how they are measured and so on.

In the words of the prophet - "Don't Panic (yet) !"

regards,
Dave

----- Original Message -----
From: "Tom Droege" <tdroege2@earthlink.net>
To: "dave garnett" <dave.garnett@metapurple.co.uk>; <tass@listserv.wwa.com>
Sent: Tuesday, November 05, 2002 4:38 PM
Subject: Re: A Comment on the Lenses (part 3)


> Ahhhh!  The problem is that no one understands the problem.  As I have
> described, the lens design has a checkered history.  Some of you out there
> have the lens design files and know what to do with them.  I do not have
> them or any idea what to do with them if I did.