On Sun, 27 Oct 2002 20:39:26 +0100, Michael Quack wrote:

>In article <3DBC2CE9.8030009@videotron.ca>,
>Alan Browne says...
>
>> The f/0.35 is a joke. I'm not even sure if
>> it is physically possible to
>> build such a beast for an SLR.
>
>Nope. The physical maximum is 0.55, which results in
>a perfect ball whose surface touches the film.
>
>The max production lens was the 0.95 built into the
>Canon 7 rangefinder.

I seem to recall an f.7, made by Zeiss for movie cameras,
as the fastest available lens, at least for film use...