--- "Mr. Bill" <[EMAIL PROTECTED]> wrote:
>
>
> Tom Pfeiffer wrote:
> > The only naming convention I've figured out is
> that the second letter
> > signifies (W)ide, (S)tandard or (T)elephoto. Is
> there more to it?
>
> Yes,
>
> � The first letter "B" is for "bayonet" if no B
> then it's a screw-on or
> clamp on.
> � The number indicates the filter size 52 = 52mm
> � The last letter indicates variations
>
> So, a BW-52C is a bayonet hood for a wide-angle lens
> with a 52mm filter
> thread. The last letter "C" indicates it is for a
> 24mm lens (A=35mm,
> B=28mm), specifically the FD 24mm f/2.8 (maybe the
> f/2.0 as well).
Only partly correct. The number does NOT refer to the
filter thread size (at least not for bayonet mount
hoods), but the the diamter of the bayonet mount.
Lenses with 58mm filters generally take 62mm diameter
hoods, for example.
=====
Bob Meyer
Life is uncertain. Eat dessert first.
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