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What to do? Bad lens? Bad D7000 body?

Omaha

Omaha, US
566 posts

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"What to do? Bad lens? Bad D7000 body?"

Omaha Registered since 07th Jan 2012
Thu 31-Jan-13 02:31 AM | edited Thu 31-Jan-13 02:33 AM by Omaha

I'm facing a decision.

I shoot a D7000. My primary lens is the 18-200.

I decided to start working up a collection of primes. I wanted faster and I wanted sharper. Makes sense, right?

So my first venture into this is a 50mm f/1.4 D. Got it a couple of weeks ago.

And I'm not happy.

Honestly, I get consistently better shots from my 18-200.

I just put together a bunch of test images. You can see them here: http://speedbinder.com/blog/uncategorized/nikon-50mm-f1-4-d-focus-test/

Those were taken with the camera mounted on a tripod, f/1.4, ISO 1000. I did this on my kitchen table, so I had whatever light was in the room.

I systematically went through and adjusted the AF Fine Tune in increments of five units. I took at least five shots at each fine tune value, and selected the best one to show on the web page. Focus mode was AF-A, using only the center focus point.

I also took a series of shots with the subject carefully hand focused via extreme zoom in Live View mode.

Each shot was loaded into ACR. I applied a smidge of sharpening, and then saved them out as PSD files. I then loaded them into Illustrator and saved the JPG's as 100% crops. You are seeing a small slice from the center of the image on these samples.

So what I think I am seeing is that this lens cal ALMOST be adjusted into good focus, but not quite. Even at Fine Tune = -20, its still a little off compared to the carefully hand focused shots. If the AF fine tune went to -30, then maybe we would have it.

So, what to do?

Is this the lens? I've not done a test, but I've never had reason to doubt my D7000 before. My 18-200 produces sharper shots than these, under whatever sloppy conditions I happen to find.

Do I just return the lens and try another one? Do I send the lens/body off to Nikon for adjustment?

Any thoughts?

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This is a hot, active topic! What to do? Bad lens? Bad D7000 body? [View all] , Omaha , Thu 31-Jan-13 01:31 AM
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