Ken Durling wrote:
>
> Yes, that's why I said "roughly." Thanks for the referral! I have
> printed out both the lens tutorial and the FAQ from photo.net. Quite
> a bit of homework!
>
Yes. lots of useful and interesting information in there.
> BTW, is the use of the carat, i.e. "f^2" meant to signify "f squared?"
Yes.
> I'm a little confused by the Newtonian form of the focus formula:
> (Si-f)*(So-f) = f^2
>
> Does this read: "the dist from rear principal point to the film minus
> the focal length times the dist from the front principal point to the
> object minus the focal length equals the focal length squared?"
Yes, that's what it reads.
Thomas Bantel
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