RobertLynn
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Buy and Sell: On
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 p.1 #2 · Front/Back Focus - AGAIN! | |
First, use your lenses on real life subject. If you notice problems, then look at all of your more recent, and maybe even older shots with that piece of equipment. Look for a common flaw. A front focus, or a back focus, which is different than a missed focus. Missed focus more commonly occurs in AI Servo mode, when the camera wasn't fast enough in tracking the action.
Front or back focus happen more regularly/all of the time and One Shot mode. It's when the area before, or after the intended subject is in sharp focus, and the rest is not.
More noticeable in fast lenses (f/2.8 and faster).
So after you've tried it on what you normally shoot, and found there may be problems. The next step is a tripod and a controlled setup. Use the cameras timer release and shoot a non-moving subject in a controlled environment. Take a few shots, making the camera refocus every time.
View the results. If the camera is focusing where it shot be, then you're okay! If the camera is not focusing where it should be, then a trip to Canon is due.
If it's all of your lenses on only ONE of your bodies, probably safe to say the body is out.
Basically this is the way I think you should look at it, as an admitted newbie, you shouldn't worry about it unless you notice a GLARING imperfection in the photo.
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