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kattz wrote:
OK, different question - get ready for it!
Gold ring glass - usually "N" coatings, AF-S lenses.
I have about 6, and went to these when my old D lenses were not sharp on the D850. I did this after both reading and asking Nikon about what I will call "sensor out-resolving glass" - my name for it, please don't get carried away. The old D lenses, even ED glass, just were not as sharp on the D850 as they were on my D3 and D5. Changing to new glass solved the issue for me. Nikon also told me that this is one reason that the D6 has less MP than the D850, so that pros could still run their D-lens collections. Their words, not mine.
Regarding the comments using these "gold ring" lenses on a Z8 body - the sensor MP is about the same. Should I assume that sharpness and contrast will not suffer using these lenses on a Z8? I am unsure how we are defining "F lenses perform better on the Z8 than on the D850 (DSLR was the exact term used)". And does the use of a Z8 eventually require the switch to Z-series "S" lenses?
This info will help the purchasing decision.
Thanks....Show more →
If, once resolution was normalized, your D850 shots were not as sharp or sharper than the same shot on your D3/D5, all else equal, then it wasn't the glass causing the sharpness difference - probably slight AF inaccuracies. If you were pixel peeping both at 100%, that wouldn't have been a meaningful comparison. To get the most out of any sensor, regardless of whether it's 20MP or 45MP, you benefit from using the best possible glass. If you are going to be scrutinizing your images at 100% on high resolution bodies, then yes it helps to have best possible glass on the higher resolution sensors, but the lower resolution bodies would also benefit from better glass.
I personally think Nikon's answer to you is BS with regards to the D6 resolution. Down-sampling a D850 to D6 resolution gives even better results in terms of sharpness, all else equal. This is the same reason why oversampled video footage is superior to native resolution. The main reason the D5/D6 have lower resolution for speed and because pros like sports photographers do not need to deliver high resolution files - in fact many of them deliver JPEGs to their agencies.
None of your lenses will ever be worse on a Z8 or any higher resolution body, all else equal, once you normalize the resolution between the two. You are never at a disadvantage there. I think what you will find is that when you use your F mount lenses on a Z body, they perform better than you are used to. Two reasons for this - 1) The AF on Z bodies is more precise, and since it is done on the sensor plane, AF fine tune and AF alignment issues are a thing of the past. 2) Z bodies focus at the user selected aperture up to and including F5.6, so if you are using a fast lens, there is no longer a potential issue with focus shift.
Also note that screw drive AF-D lenses will not AF on Z bodies. There are no screw drive motors in the bodies and the FTZ adapter does not support it either.
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