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taob
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PostPosted: Fri Jul 31, 2009 3:11 pm 
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I wonder if they fixed the rolling shutter "jello-cam" problem that plagued the D90's video...
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Dimitris
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PostPosted: Fri Jul 31, 2009 3:14 pm 
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taob wrote:
I wonder if they fixed the rolling shutter "jello-cam" problem that plagued the D90's video...


Is it fixable? I thought it was related to CMOS sensors and both the Nikon and Canon could be susceptible to it on fast movement? I recall reading something to that effect anyways, although I could be remembering wrong.
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mawz
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PostPosted: Fri Jul 31, 2009 4:19 pm 
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taob wrote:
Kin Lau wrote:
Hopefully they've improved on the very bad corner and edge performance.

It's not a noticeable problem for me on the D700's, especially since I tend to add more corner vignetting in post anyway. ;) The lens is sharp in the 90% of the frame my subjects tend to occupy, and besides the corners/edges are usually out of the focus plane. If I really needed corner-to-corner flat-field sharpness, I'll set my 105mm VR macro to f/8 and be done with it.

The D300s tempts me as a second-shooter/backup camera, but I doubt I'll get the new 70-200.


It is however a VERY noticeable issue on the D3x. To the point where the 70-200 had to be stopped down to f5 or slower to get good results (and coincidentally delivered results no different than the 70-300VR at the same equivalent aperture).
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taob
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PostPosted: Fri Jul 31, 2009 7:05 pm 
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Dimitris wrote:
Is it fixable? I thought it was related to CMOS sensors and both the Nikon and Canon could be susceptible to it on fast movement? I recall reading something to that effect anyways, although I could be remembering wrong.

They would be, due to the way the image data is "scanned out" from the sensor. However, the D90 seemed to have a slower scan rate than others (like the 5D Mark II) and thus the effects were more pronounced and noticeable at slower panning speeds.
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taob
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PostPosted: Fri Jul 31, 2009 7:10 pm 
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mawz wrote:
It is however a VERY noticeable issue on the D3x. To the point where the 70-200 had to be stopped down to f5 or slower to get good results (and coincidentally delivered results no different than the 70-300VR at the same equivalent aperture).

Are you saying the vignetting from the same lens is more noticeable on a D3X vs a D3 or D700? Is there a different microlens array in front of the D3X sensor that causes it to be more susceptible to light falloff at extreme angles?
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mawz
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PostPosted: Sat Aug 01, 2009 11:04 am 
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taob wrote:
mawz wrote:
It is however a VERY noticeable issue on the D3x. To the point where the 70-200 had to be stopped down to f5 or slower to get good results (and coincidentally delivered results no different than the 70-300VR at the same equivalent aperture).

Are you saying the vignetting from the same lens is more noticeable on a D3X vs a D3 or D700? Is there a different microlens array in front of the D3X sensor that causes it to be more susceptible to light falloff at extreme angles?


No, it's the lack of sharpness outside of the centre which is much more noticeable on the D3x, which si far more demanding on edge performance than the lower-density D3/D700 sensor. The vignetting is somewhat of an issue, but generally an overblown one.
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sabesh
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PostPosted: Sat Aug 01, 2009 11:20 am 
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Mawz, I agree. The 70-200VR corner performance blows. I did some wedding candids with it where the subject's face fills the frame .. you can notice it there. Also with landscapes. And this is on a D700. However, centre performance is amazing, so I just compromised and achieved good results. The new edition is a welcome upgrade, I'm sure. Anyways, I pre-ordered one. Cheers.
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