> Said another way, for critical focus ability, one needs a lens
> capable of B- or better wide open. Less than that and critical
> focusing is guess work.
Gary,
Thanks for that! That probably explains why I've had some unexpectedly
poor results with my recently acquired (and much cursed) SC 50/1.4 lens
when taking low light portraits at full aperture. I couldn't understand
why the main subject's face was often blurred, when I thought it should
be in focus, yet the back of the chair on which he/she was sitting was
clear (i.e. not camera shake). I'm going to get a better 50mm ASAP,
maybe a nice cheap MC 1.8 (I must be the only List member who doesn't
already own one or more of these!).
Regards,
Ray
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