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03-24-2011, 04:38 AM   #1
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DA 55-300 at 300mm weird out of focus area


Well, I'm not sure if it is weird, I'd just like someone to explain what's happening here.
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Is it just motion blur? I did take a similar photo at 170mm that didn't exhibit that blur. The only reason I'm confused is that the focus area is reasonably ok, or certainly doesn't have the blur to the same extent, but that is probably just because it is in focus?


03-24-2011, 04:55 AM   #2
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I'd say that the subject is not really in focus, but slightly frontfocused. So it may still look reasonably sharp while showing "soft" halos around the subject.

Another possible explanation: your lens may not be at its best at the given focal length.
03-24-2011, 05:02 AM   #3
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Looks like camera shake to me. If you look closely, the foreground subjects aren't in sharp focus, either. What shutter speed did you use? Do your other shots taken at 300mm exhibit the same quality?

The DA 55-300 is supposedly quite good at 300mm.
03-24-2011, 01:16 PM   #4
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The shutter speed is 1/800, I guess camera shake is probably a good explanation, I was taking the picture from a fair distance trying to shoot over other people's heads. I haven't really shot enough with this lens to give a fair summary of it's qualities at 300mm.

Thanks guys

03-25-2011, 06:35 AM   #5
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It appears to be motion blur. I think your 1/800 shutter speed rules wind out. Odd effect though. I think the better light in the foreground is hiding the shake. You can do this with flash so it's likely to happen in certain conditions of natural light too.

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