joer wrote:
There is so much bad information in circulation spread by people with little or no experience repeating what they don't understand.
The D850 or any other high pixel count camera do not require upgraded or special lenses. As always some lenses are better than others, but if you are currently satisfied with your current lenses, they will be even sharper on a high pixel count camera. Check the DXO Mark data for any lens on different pixel count cameras.
While it does not "require" new lenses, a lens with higher resolution capability will look better on a higher mp camera. A good lens will not look any better on a high mp camera, but an amazingly sharp lens will definitely look better on a high mp camera.
The DXO Mark score is often misunderstood. A 28-300 records a P-mpx of 7, 10 and 11 on a 12 mp D3, a 24 mp D600 and a 36 mp D810. The lens isn't any sharper on the D810 than it is on a D3.
On a D3, with a score of 7 p-mpx, the lens will take advantage of 58% of the 12 mp - or put another way, it would behave like a "perfect" lens on a 7 mp camera.
On a D600, at 10 p-mpx - it will only use 42% of the camera's 24 mp, and on a D810, a score of 11 only utilizes 32% of the pixels in the camera.
On the other hand, a lens like a Zeiss APO Sonnar T 135 F2 will show 12 mp on a D3, 22mp on a D600, and 35 on a D810.
The 28-300 lens isn't any sharper, really, on the 36 mp body compared to the 12 mp body - but the lens is a better fit for the lower mp body. The 135 F2 is as close to a perfect lens as you can get - showing scores of 12, 22 and 35 p-mpx on the trio of cameras.
The Zeiss lens is so sharp that it seems to come close to exceeding the resolution of the 36 mp D810 - utilizing 97% of the camera's resolution, while the 28-300 is a complete dud at using only 32%.
There is no question that the sharper lens will return far better results on a high mp camera. These two links provide some good information on which lenses work well with the D850.
http://www.dslrbodies.com/cameras/the-d850-blog/the-best-lenses-for-the.htmlhttp://www.dslrbodies.com/cameras/the-d850-blog/more-about-appropriate-d850.htmlAnd this is a great explanation of what P-mpx actually means and how to use it.
https://petapixel.com/2012/12/17/perceptual-megapixel-mtf-charts-boiled-down-to-a-single-number/