D7100 Owners: Test the left AF accuracy before you keep it!

Started Mar 24, 2013 | Discussions thread
photomunkey
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Re: D7100 Owners: Test the left AF accuracy before you keep it!
In reply to kk123, Mar 25, 2013

kk123 wrote:

Reilly Diefenbach wrote:

I believe this is the first D7100/351.8 focus thread. I'm sure there will be many, many more.

Superb AF on my D7100. Of course I switched from the ridiculous try to impress customers and sell more cameras 51 slow focus points, to the quick one spot center AF. And please use AF-S when you take single shots. And drop sending back the camera.

Please also note that the size of the shown AF-point is smaller than the real AF-size. Confused?

Yes, if you use a too small subject for focus, which the AF doesn't find and you get a sharp background. Backfocus? Not at all. User error and misunderstanding.

Solution? Go closer, find something bigger to take picture of or increase focal lenght of your lense. Sometimes, even manual focus will do.

As they say "provide proof, or it didn't happen". http://www.flickr.com/photos/38350658@N04/8588751814/ D7100 with the 35mm f1.8G at f2.2. AF-S, single point only, spot metering, point of aim right on the two horizontal bars on the nose of the little train. The AF back-focus grows greater the farther out on the AF points you go. I've used the "rule of thirds" point for most of these, or the point just past that to ensure the plane of focus isn't being distorted by the lens at the extreme outer edges.

There is an issue, folks, and while I appreciate everyone's gung-ho "Yay Nikon" attitude, the sooner this is realized the sooner steps can be taken to fix it with the affected bodies. If I got a returned D7100 after them being on the market for a week, that points to an issue.

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