T3D Re: T3D Re: T3D Now yer in trouble

[bercov@xxxxxxxxxxx (John Bercovitz)]

>   What format? 35mm or MF? If 35 mm do we
> want 5 perf coverage or 7 or 8 perf? Ortho
> FL or not?

I guess most people on this list would be
interested in 35 mm format.  MF is easy
and large format even easier.  V-M is 
difficult but not too difficult because 
of the smaller field of view.  So I would
guess people would be most interested in
35.  I would think ortho.  If not ortho,
again, the design is not that difficult -
a cemented doublet would do.  But I think
the decision as to which lens is most
wanted should be up to the group so I 
left that blank.
 
>   Are we talking a big diameter lens for
> homebuilt viewers or a 20 or 25 mm diameter
> ocular that we can retrofit our red buttons
> or Kodaslide II's with?

What would you like?  I would personally 
like a lens of large enough diameter that
no adjustment is necessay but the cost could
be exorbitant.

>   How much is "won't be any more expensive
> than off-the-shelf lenses"?  $20 a pair,
> $50 a pair or $100 a pair?

I would think this would be a many-lens design 
and so would cost like a good telescope eyepiece
or ~$100 each, $200/pair.  Is this too scary?

> Questions, questions - Greg E.

Good ones, too.  Thanks for kicking off the
discussion.

John B


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