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Focus is the mechanism of converging light from a point light source onto an imaging plane by a lens.

11 votes

Why would I want to select an autofocus point?

As it is, with the 9 AF points on the 5D2, It's quite challenging to even get a shot in focus. Take, for example, a Diving Pelican. … Obn the other hand, when you get a shot in focus, it's worth it. One second later: …
Fake Name's user avatar
  • 3,350
2 votes

Is there a webcam that can focus to infinity, for time-lapse landscapes?

I have a Microsoft LifeCam Studio, and it can focus to infinity (it's AF). I don't know how easy it would be to remove the IR filter, though. It's basically an aluminium tube. …
Fake Name's user avatar
  • 3,350
4 votes

Why is my Canon Powershot A1100 focusing only on the bottom part of scenes?

The road in in focus to a distance well past the church steeple, so the steeple should be in focus, but it is not. This may very well be a hardware problem. …
Fake Name's user avatar
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