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I wonder why the 24-70 f/2.8 has no VR

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digital ed said:
digital ed wrote:

Some people whose photographic opinion I trust feel VR decreases the sharpness of a lens. The added elements to move the image degrades the potential sharpness.

My evaluation, as an engineer, is that VR is a servo and there is always a basic noise level in a servo loop. The noise can dither the image in some conditions.
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Even if that decrease could be demonstrated on a print, I would trade that bit of compromise for the increased % of shots that are in focus. Bumping up iso increases noise, so pick your poison. Tripods can be a pain and prohibited in many museums. Try taking a shot of the Declaration of Independence inside the National Archives. No flash, no pods. You're looking at iso 4000-6400, F2.8, 1/30s or less in there. I prefer to own a few zooms rather than a dozen primes, so don't have those 1.8 lenses.

In my less than perfect hands, VR allows a greater % of sharp shots.
 
The whole myth about VR degrading IQ is BS to me. All of the exotic telephoto primes has it. 70-200/2.8 is also another obvious one. The 16-35/4 proves to be very useful with VR.

Having VR on the 24-70 would be a huge plus because as soon as more DOF is required, the f/2.8 advantage is gone. So now you're either stuck with bumping the ISO or lower the shutter speed. For events or wedding receptions, I prefer the 24-120/4 for better range and VR plus a 50/1.4 for isolations but if Nikon release a 24-70 with VR, I would instantly switch back.
 
shaunly said:
shaunly wrote:

The whole myth about VR degrading IQ is BS to me. All of the exotic telephoto primes has it. 70-200/2.8 is also another obvious one. The 16-35/4 proves to be very useful with VR.
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shaunly said:
shaunly wrote:

The whole myth about VR degrading IQ is BS to me. --
www.flickr.com/shaunly
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This may be true cause I also do not see any sharpness degradation with the 105/2.8 VR macro. But it may be untrue regarding the bokeh.
I can see also another disadvantage of having VR on the 24-70 lens: VR needs at least a fraction of second to switch on. This may result in a loss of crucial shots by a press photographer and the lens is intended for the use by photojournalists rather than for amateur photographers.
 
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