In general talking of a prime you only set up the chip once.
That will give 2 items of information, the focal length and max. aperture, which in many cases is enough to indicate what lens was used. Of course if you have multiple lenses of similar focal length and aperture this doesn\'t work. Nor does it give the correct aperture once you stop
down.
Other than that it is almost as easy to use as AF.
I think many people simply misunderstand the function of this AF-confirmation chip.
The only flaw is being able the ability to change the aperture settings after programming, which does nothing but confuse.
Other than that the BIG IS chip is easy and effective, IMHO.
Now if only the Pentax PK mount wasn\'t rotated 45dgr, but that is a different matter
Ruy
Jul 07, 2009 at 11:43 AM
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