RE: EOS EES D60 and f/8

[Henning Wulff]

At 2:33 PM -0500 10/28/02, Fero Bednar wrote:

Yes, but it could give you at least autofocus confirmation when in MF,
couldn't it?

Fero

-----Original Message-----
From: Lars Michael
Sent: October 28, 2002 12:52 PM



You'll only have manual focus for
lenses slower than f/5.6.  This is
due to the AF sensors not getting
enough light, so blocking pins
won't help.

Lars

 Does EOS D60 focus with lenses slower than f/8? I plan to use it with
 400/5.6 + 1.4 TC. If not what about blocking some pins? Do you have
 osme experience with this? Can not it damage contacts on camera body?

 Thanks,

 Fero

--
 .~.   Lars Michael

The AF sensors depend on angular information, interpreted as contrast by the circuitry. When the rear exit pupil of a lens is too small (ie, the side to side angle of the rays hitting the sensors is too narrow), they don't respond correctly anymore. If they could respond correctly, AF would be possible. If they don't respond correctly, why would you want a readout??? An incorrect confirmation isn't much use.

--
* Henning J. Wulff
/|\ Wulff Photography & Design
/###\ mailto:henningw@;archiphoto.com
|[ ]| http://www.archiphoto.com
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