Your 20-40 is a DC motor lens, not SDM. Now I have two SDM lenses, a
16-50 2.8 and 50-135 2.8, the 16-50 is fast enough, the 50-135 is slow
to focus, although its speed improved when it had its SDM motor changed
after it broke down. The 50-135 is very good at follow focus, though. I
also had the 55mm 1.4 SDM and it was slow indeed, although accurate.
The only DC lens I have, the 18-135 WR is quite fast, faster than any
SDM lens I've had so far.
El 25/05/2016 a las 6:22, Zos Xavius escribió:
Every SDM lens I have used has been dog slow. My Bigma crushes the
60-250 in terms of focusing speed. My 20-40 is pretty slow too.
Thankfully I rarely shoot action. The SDM lenses seem to hunt less but
they do seem to micro adjust a lot which makes focus kind of on the
slow side. the 17-70 i have is usually pretty snappy but it also
misses a whole lot. the 60-250 is almost always dead on if I get if a
chance.
On Tue, May 24, 2016 at 7:31 PM, Bill <anotherdrunken...@gmail.com> wrote:
On 5/24/2016 11:40 AM, Larry Colen wrote:
One of the reasons that I was interested in the DA 55 was that having
its own motor, I thought it should focus more quickly. When I was using
it the other night to photograph dancing, however, it seemed really slow
to focus. It also seemed to need to "hunt focus" more than a lot of
lenses, rather than just snapping to focus, it would rack all the way
out, and then back into focus. My 16-50 is normally quite good about
focusing quickly, but I tend to only use it where there is a lot of
light (at least by my standards of a lot of light).
I couldn't compare it directly with my FA50 as it was in heavy use by
someone else.
Has anyone else run into these issues?
I think it was a bit slow to focus. I can't put one on a camera, as it is
between homes at the moment.
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