On 12 Feb 02 at 20:06, [EMAIL PROTECTED] wrote:
> Hi Pawel,
>
> Pawel Nabe wrote:
>
> > I am a little confused. I have several fisheyes and I never
> > ever had to compensate. Not even with a circular fisheye that
> > obviously gives you black corners.
> > I shoot slide film with A-1, T90, EOS 600, RT, 1V.
> >
> > A friend of mine has the same lens as you and he never compensates
> > his EOS 50 as well. He shoots negative film.
> >
> I own a EOS50E as well and there is no exposure compensation needed with (your
> ex- :-) ) Zenitar Fisheye.
>
> The problem with the EOS30 is known (and documented by Canon). The meter doesn't
> work correctly with manual stop-down lenses (lenses that do not stop down using
> the electronic comunication through the EF-mount)
>
> This is actually a major drawback of this camera (and I don't want to start the
> discussion again, but I can't understand why the HELL Canon did it). And that's
> one of the reasons I keep my trustable EOS50E.
>
> The point is that I found the meter to be off the same amount at the whole range
> of f/stops of the lens, what makes an ISO compensation a manageable
> workarround.
>
> One curious thing: the amount of compensation I found is 2,2/3, what is
> suspiciously close to the 2.8 maximum aperture of the lens. Can somebody try
> another manual stop lens with a different maximum aperture to see if we can
> trace a line here?
The compensation required is indeed quite close to the difference
between <maximum aperture> and <f1.0>....
This very problem also occurs with the (fine-)spotmetering of the
1(n) (anyone with a 1V or 1D to add some data?).
With a 1100/f10.5 mirror lens, things get nasty....that makes 7 stops,
which is more than you *can* compensate in any automode with slow
film, even with normal compensation (max 3 stops) and
ASA-compensation combined (there is only 3 stops between 50 ASA and
the 12 ASA minimum).
Not that I would mind a much lower minimum ASA-setting anyway, for
IR film with the darkest IR filters (#87B and #87A)....not an
application I want to sacrifice the normal exposure compensation for
either!....:))
(haven't shot that film without a +1/0/-1 bracket since I started
many years ago, although mostly in full manual, based on
the Sunny-Sixteen rule of 1/ASA seconds @ f16....but a exposure meter
that is at the same level is still rather convenient to have
alongside)
--
Bye,
Willem-Jan Markerink
The desire to understand
is sometimes far less intelligent than
the inability to understand
<[EMAIL PROTECTED]>
[note: 'a-one' & 'en-el'!]
*
****
*******
***********************************************************
* For list instructions, including unsubscribe, see:
* http://www.a1.nl/phomepag/markerink/eos_list.htm
***********************************************************
