>> Julian Loke wrote:
>> Did you manage to perform your f/5.6 AF experiment?
>> What was the outcome?
> F. Craig Callahan wrote: ...
> ... Thus, while the AF system would not confirm focus, it did continue
> to function for vertical lines (or at least attempted to do so) at
> f/5.6. Clearly, the sensors do not simply deactivate at f/5.6; rather,
> f/5.6 should be considered outside the limit of when accurate focus
> can be consistently achieved. Hence, it may be possible to achieve
> vertical-line AF at maximum apertures smaller than Canon specifies,
> but your results are unlikely to be consistent.
Hi Craig,
My EOS 1000FN, whose single autofocus sensor is sensitive only to
vertical lines, behaves in a similar indecisive fashion when forced to
work with horizontal-only detail (e.g. when I tried to focus on the eyes
when shooting a portrait :-(
AF works sometimes (surprisingly), but would fail more often than not.
The unreliability made manual focus much more attractive.
So, I'm still a bit confused. Would it be correct to conclude that the
EOS 3 does not have vertical sensors at f/5.6?
Cheers
Julian Loke
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