any 135mm lens is a +7.5 in diopters. adding other +7 diopters will result
in a 14.5 diopters that is a 70mm lens. A 70mm lens on a mount calculated
for the double (135-150) should give about a 1/1 reproduction ratio. Nothing
to compare to the 80 f/4, I think.
Marco
----------
>Da: "jahudson" <jahudson@xxxxxxxxx>
>A: "LIST - Olympus" <olympus@xxxxxxxxxxxxxxx>
>Oggetto: [OM] Vivitar close up filters
>Data: Sab, 10 apr 1999 1:20
>
> I wonder what the photo performance would be using a +4 diopter filter with
> a 135mm / 3.5 lens?
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