scyrene said:Wesley said:JohnUSA said:Think of shooting a person hand-held wide open... subject is swaying a little and so is the photographer. Each probably move more than an eyelash length. I shoot weddings... I'd welcome the new option.
If your focus is ruined enough by swaying a little than you shouldn't be shooting wide open.
Stop down and/or raise ISO.
Sheesh. I don't do tonnes of portraiture, but I've done enough - and used very wide aperture lenses with and without IS - to know that it's not as simple as you make out. First, wide aperture gives a look that many like, and cannot be replicated by other means. Second, with ambient lighting, it's quite easy to hit the practical upper ISO limit AND the minimum handholdable shutter speed EVEN shooting wide open. Any technological help with every aspect of photography is to be welcomed - the same attitude was used to dismiss IS, AF, automatic metering, and a host of other advances. They each have their place - for some of us, at least. Telling people they're wrong to desire a little extra leeway is pretty narrowminded.
If you're hitting the upper ISO limit and minimum handhold SS even shooting wide open than you really can't complain about ruined focus. You should know it was coming. At this point, I would be more worried about motion blur and the AF system retaining accuracy in that low light...
Use a monopod/tripod or HSS flash. More stable platform. Modeling light or speedlight infrared aid AF system.
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