> I've a question regarding the 300 f4 EDAF:
> Can this lens be used without a filter in
> its drop-in filter tray? Is it necessary to
> have a filter in place at all times?
The manual says always have a filter in the
holder.
> If so why?
I don't know. Probably has something to do
with some terribly complicated optical thingie.
> Is a polariser available for this lens?
Yes. Kirk makes one. It's expensive, though.
> I'm faily keen on buying this piece of glass
> so any comments on its qualities would be
> appreciated.
Optically it's flawless. Razor sharp all
the way to the corners wide open, very even
illumination, excellent contrast, and (most
importantly) really nice bokeh.
AF speed is slow, but there's a range limiter
that helps a bit -- until something you want
to shoot pops up too close.
-Don
