Actually, I've mostly given up on the separate focus button. I
originally used that feature on the 5D because with action shots (like
soccer games) I found that I had problems focusing on a fast moving
subject and gave the camera a chance to focus on the wrong thing. But,
at one of my grandson's soccer games in the spring I seriously missed
focus on a few shots and decided to try putting focus back on the
shutter button. I don't know if its me or the E-M1 vs the 5D but I was
doing so much better focusing on fast moving kids that I left it that
way and haven't changed back.
But in the particular 300mm shots I was talking about I was trying to
shoot a great blue heron in our pond. I was surprised that he let me
get within about 30 feet of him. But in that case I was using manual
focus and 5X magnification. It's not bad and I think f/9 would have
nailed it. And, no, I'm not afraid of diffraction at f/9. I was intent
on getting the shot of the heron and the aperture is just where it was
set and not set intelligently.
I just need more practice using these long lenses. Prior to the
E-things I never regularly carried a lens longer than 200mm. Now I have
300 and 600mm equivalents. I've done a fair amount of event shooting
here in the last couple of months but not much for myself. The 12-50 is
the usual lens of choice.
Chuck Norcutt
On 7/11/2015 6:17 PM, Moose wrote:
On 7/11/2015 8:35 AM, Chuck Norcutt wrote:
I wish my results with the 75-300 were as good. I don't think it's
the lens. Either vibration (me) or focus or both. Actually, maybe
insufficient DoF if I'm wavering back and forth.
This is a regular problem for me hand held, although I notice it much
more with CU/macro. My body has a tendency to move slightly forward and
backward, moving the plane of focus. I try to bracket, try to catch the
moment when my movement is at the right place or discipline myself to
get focus close, but then press through AF to shutter release in one
quick motion.
I'm much more prone to the last with long tele shots, which may be part
of why I have less trouble with them. I can see where your technique of
AF on a separate button could make it even more difficult.
--
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