Re: Upside down camera (digest 1600)

[P3D Gregory J. Wageman <gjw@xxxxxxxxxx>]

Bob H. comments:

>What bothers me about the RBT and melding, is that it seems to me  they
>just grab two lenses marked 50mm or whatever. Two zooms are an awful
>thought as they surely don't agree on a given marked postion. All the
>early '50s stereos had matched focal lenghts as did the preceeding
>generation cameras (short of box atereos). This was not done by picking
>the label but by matching on an optical bench or similar means.

If I remember rightly, the literature advertises "matched, coupled lenses".
I would presume that means more than simply picking two lenses of the same
type.  Also, the coupling arrangement could allow for some fine-tuning of
any differences.  Jon Golden might like to jump in and comment here...

In any case, I will be able to give you firsthand observations of my
results just as soon as my RBT X2B gets here later this month.

	-Greg W.


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