On 18 Feb 2005 at 6:43, Bob Talbot wrote:
> > Anyway, those who want less focal length should shop for a
> secondhand
> > (or perhaps even today still factory-new??) Canon ('FD') 20/3.5
> micro
> > lens, and invest some more in extension tubes & bellows (not
> > necessarily the expensive Novoflex toys....those can only be
> > justified if you want to maintain AE/AF control with EOS lenses,
> > otherwise an all-mechanical Russian or Pentax M42 bellows will
> > do....if you look hard enough you might even find one with
> tilt/shift
> > (like the rare HAMA/T2 bellows, with even more rare T2-reversal
> > adapters (to mount brand-lenses onto the T2-bellows)).
>
> Willem-Jan
>
> Are there any issues when using fully manual lenses on the EOS DSLR
> bodies? Is it just a matter of ignoring the metering (working on full
> manual) ?
Sorry, meant only aperture-control, not AE-metering.
> One of the annoyances on my EOS 1n was always that if you tried to use
> Canon's 2x converter (on the camera) then adapt to a manual mount lens
> it just froze.
Dismount the converter slightly, a few degrees of rotation, so that
the inside lever, that tells the camera that a EOS-lens is mounted
(and hence expect to get data transmission, failing of which means
error), is disengaged.
Additional problem on the 1(n)/1D is that the (fine-)spot sensor is
located down in the mirror box, and requires lens-info for
correction....failing of which means extreme over-exposure (to the
level of the difference between <max lens aperture> and
<f1.0>....which, in case of slow mirror lenses (1000mm/f11, can even
become too much to compensate, even with ISO-setting & normal
exposure-compensation combined)
I now also wonder if the 20(D)(a) has the sensor in the same
location, and hence whether it can still do a reading with the mirror
up, needed for the LCD-preview mode.
(although the camera has to be in manual mode for that anyway, see
one of the previously mentioned sites!)
--
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'!]
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