>> IMO, a perfect example of Canon just plain being evil. I never
>> realized how much I subconsciously used the focus confirmation on my MF
>> lenses with my -DS until I tried using some on my friend's RebelXT.
>> Between the bad viewfinder and lack of focus confirmation, it's extremely
>> difficult to focus MF lenses.
>>
>> -Cory
>>
>
> Actually it's merely an example of how the Canon AF system works. A fair
> bit of the AF processing in the Canon's is in the lens, so without a
> lens chip, no AF as you don't have the full AF system present, this is
> why issues will come up with Canon with some lenses having improved AF
> algorithms. Pentax and Nikon do everything in-camera and rely on the
> lens only for data (max aperture, focal length and focused distance[the
> last if available])
>
> -Adam
>
Really? Well honk my hooter... I wasn't aware of that. I can see
how the body needs to know some things for AF, but it seems weird to
actually put *processing* in the lens. A camera body has as many or more
AF variables in it than the lens does (number of AF sensors, matrix
metering algorithms, etc). Seems like there should be a fall-back.
Oh well... if that's true then I stand informed. Not necessarily
corrected since Canon is still evil... :)
-Cory
--
*************************************************************************
* Cory Papenfuss, Ph.D., PPSEL-IA *
* Electrical Engineering *
* Virginia Polytechnic Institute and State University *
*************************************************************************
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