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D7000 lens whip? Quiet mode?


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rasworth

Austin, US
1191 posts

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rasworth Basic Member
Fri 10-Jun-11 06:35 PM

After I first received my D7000 I started a thread about vertical smear I was experiencing, both with a 16-85VR and a 55-200VR. I finally decided it was primarily a technique problem, i.e. I needed to wait longer to let the VR settle, although I was never completely convinced.

Along the way I obtained a 24-120VR f4, and have been using it as my default lens on the D7000. It works very well, to the point that I sold the 16-85. However, it is fairly large and heavy, and I decided I would obtain a used 18-105VR for casual travel use.

Long story short, with VR on or off, at 105mm the vertical smear is back. I've taken many shots, using the 1 second delay on and off, to prove to myself it is indeed vertical lens motion. I have to go to 1/320 (at any aperture) to completely suppress it, again with or without VR. At wide angles the lens works well at slow shutter speeds with VR on, and as long as I stay above 1/320 it is acceptably sharp at 105mm. The 24-120 is free of this effect, stays sharp at 120mm easily down to 1/60 with VR on.

I previously owned a D300, and saw some of this on a 70-300VR, although not on any other lens, including the 16-85. I attributed this to physics, and compensated by only shooting long with fast shutter speeds. I was pretty much resigned to the problem on my D7000, assuming the lighter body transmitted more mirror vibration to the lens, or some such phenomenon.

However I decided to try quiet mode on the D7000, and was surprised to find it seemed to kill or at least greatly reduce the effect. I assumed that quiet mode merely held the mirror up until the shutter button was released, but I did see one assessment that it also slowed the mirror rise and delayed shutter acutation slightly. In any event I will probably adopt it as my normal mode. The attached images were without and with quiet mode, ISO100, f5.6, 1/125, 105mm. I do wonder if Nikon cut it a little close on their mirror up to shutter release timing.




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Richard Southworth

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