In article
>Bob Neuman (d_ruether@hotmail.com) wrote: (...)
>: No problem, except the AF marking in the center of the F4 screen has
>: little value in an F3. Hope this helps.
>
>IIf you want a bright screen for your F4 try the type "U" screen; I'd
>guess it's about a stop "brighter" than the regular, still
>pretty-darn-bright screen. This screen is only intended for telephotos,
>and you have to set the exposure compensation on the finder differently
>for different lenses. (...)
>I would be wary of any non-OEM screens because I doubt that the
>manufacturers have so thouroughly figured-out the exposure compensation
>necessary for use with different lenses.
>A question to anyone knowledgable: if a screen requires "X" amount of
>exposure compensation, is the amount still "X" when you add a
>teleconverter or does it change?
If the screen is used in an F3, no compensation is needed since the
meter does not read off the screen. In an F4, it could be a real pain,
since center-weighted and matrix readings are taken off the screen,
and spot readings are not. As to the last question, experimentation
is probably the best source of an answer (my guess is that the compensation factor remains constant with all screens, except perhaps
the "U" if its transmission varies with lens angle of view [probably
only relavant if short lenses are used with a converter]).
Hope this helps.