Chip,
The AF on the ef 15 is slow but with almost unlimited DOF
the AF speed is of less importance. I sometimes use my ef15 on
my MF EF-M. When switching it to my eos5 I sometimes forget to
switch it to AF. I usually notice only after a few frames, as the
DOF is so great the camera thinks it is in focus and will let me
shot a few frames!!
-Dan
Chip Louie wrote:
>
> >
> >
>
> Hi George,
>
> I like the Canon EF 14mm 2.8L optically but the Sigma 14mm 2.8HSM lens is a
> better price by far, I'm considering one myself but am somewhat concerned
> about the reported lack of overall image sharpness of this lens when used
> for full frame 35mm. Some have reported that for use on a D30 camera the
> image quality is OK but for 35mm it is marginal. I'm still looking for more
> info or a Sigma 14mm to borrow to judge for myself but have not found one
> yet.
>
> The Canon 15mm is excellent but has an ARC motor for AF and is noisy and
> slow focusing. There is a Russian 16mm fisheye for $160 USD or so that
> looks pretty good, especially considering the price but it has no AF and
> uses stop down metering like in the old days of SLRs. I have seen nothing
> reliably reported on the Sigma fisheye though.
>
> Regards,
>
> Chip Louie
>
>
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