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D300 autofocus issues

giggem

Austin, Texas, US
3 posts

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"RE: D300 autofocus issues"

giggem Registered since 05th Jun 2009
Sun 28-Jul-13 10:15 PM | edited Sun 28-Jul-13 10:40 PM by dm1dave

>You probably want to be careful about attributing blame to
>the camera. The lens is normally soft at the longer end. And
>aperture choice makes a big difference as the lens has a
>variable aperture and is not at its best wide open.
>
>What kind of test conditions are you choosing? Do you have a
>specific methodology and test target. Do you have enough
>light? While it is possible to calibrate focus on the 18-200,
>the wide range of focal lengths makes calibration
>impractical.
>
>Why don't you post a test image so we can get an idea of what
>you are seeing?
>
>I think in general, the 18-200 is the reason for softness as
>it is an all purpose lens that is just average in image
>quality. There is nothing wrong with the lens - just a little
>soft when viewed at high magnification.
>
>Eric Bowles
>Nikonians Team
>My Gallery
>Fall Workshops - Golf Photography at the Tour Championship and Fall Color in the Smokies
>
>Nikonians membership — my most important photographic
>investment, after the camera

I realize the lens is somewhat soft on the tele end. However, it does (or did) at least achieve focus. No more. My speculation that it may be the camera had to do with the fact that, prior to my lens that is being repaired failing to zoom in, the barrel of the lens began to "wobble", that is, it would move laterally to a degree. My speculation is that this wobble may have somehow damaged the sensors at the lens coupling on the camera. This is pure speculation, but it seems to make sense in some way. I'm not blaming the camera or the lens at this point. If nobody else has had this issue, it looks like Nikon will be getting some more of my money.

Thanks.

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A general, generic topic D300 autofocus issues [View all] , giggem , Sun 28-Jul-13 10:28 AM
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