Question about Tokina 12-24mm f/4 Pro DX for Nikon
My focus seems to prefer 7 feet instead of infinity. It seemed to work OK when I first got it, but now all of the shots are coming out a bit soft when using autofocus. It never goes into the infinity range, stops just short of it. I have 2 D300's, and it does the same thing on both cameras. Any ideas?
You may have a dirty contact on the tc cpu pins. Try cleaning the pins with a clean pencil eraser or some methanol. You could also have a loose connection between the tc and the lens or body. Try applying a rotational force in both directions...see if you notice any change in behavior. If you have a local shop, see if you can try another copy on your lens.
The 17e may have slow-ish performance in low light, but it should still be usable. If neither of these issues is apparent then it may need to be exchanged or serviced.
Posted on Jan 25, 2008
Barrel distortion like you describe can always be a problem, especially at ultra-wide focal lengths like yours at 12mm. Some of this can be compensated for in software... Adobe Photoshop CS2 and Elements do a reasonable job, IMO, Bibble Pro (www.bibblelabs.com) does even better, especially with the 3rd party plugins like Percy perspective correction. These are things we have to live with when we have smaller sensors and ultra-wide angle lenses. There is nothing wrong with your lens, you will probably find that this distortion is minimized if you use a longer focal length (say 14mm) and/or stop down the lens a bit.. try f8, wide angle lenses have huge depth of field.
Posted on May 20, 2008
Only the MkII version of this lens has an autofocus motor built in, the MkI relies on a motor in the body of some Nikon AF SLRs to autofocus. The D70 does not have an inbuilt AF drive motor, so if you have the MkI lens then you can only use it in manual focus mode on your camera.
Posted on Aug 05, 2009
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