The latest rumor (translated slides) suggests there are some really nice enhancements in the D850.
As Art suggests, one of the most interesting to me is the support for focus stacking. It appears the camera will have the capability of generating a large stack of images with small focus adjustments on an automated basis - similar to bracketing. The amount of adjustment and number of images are set by the photographer.
The small focus point for macro and some close focus work is another feature that sounds interesting. The AF sensor would be about half the size of a normal AF sensor allowing a lot more precision for Live View focus with automation support.
Quiet Mode has a couple of nice enhancements. It appears to be completely silent - not just reducing the mirror sound. That makes it suitable for golf or wedding ceremonies where sound must be avoided. I can't wait to use it for golf.
The description is not very clear, but it appears Quiet also supports a very high frame rate using technology similar that used in the Nikon 1. Smaller 8 MP images can be captured at up to 30 fps in DX mode with focus and exposure not changing. That's a great feature for situations where you need a precise image and can sacrifice file size. I've tried this with the V1 and it works very well.
The video features continue to advance with more support for 4k Movie and 8k Time lapse video. I suspect there is more coming with video.
I like the new WB option - Natural Light AWB. I normally use Daylight because the Auto WB options are not good for outdoor lighting, but the new setting has merit.
The rumored image size of 45 MP is a nice step up. This implies lower noise at all ISO levels by 1/3-1/2 stop. The technology is better, but the larger file is downsized to a common output and that alone will reduce noise.
The frame rate of 8 or 9 fps is a very nice step up for a high resolution camera. I don't see many cases where I really need a fast frame rate, but it's nice to have in reserve. I wonder if I could program a function button to change the frame rate to the fastest rate on the fly without accessing the menu. Imagine tracking a bird into a nest, and as it is landing moving from 3-4 fps to 8-9 fps.
I'm very pleased with the XQD and SD UHS-ii card combination on the D500 so having it on the D850 will mean both my cameras are using the same cards. It also provides some flexibility as SD cards can be readily bought or shared.
In any event - I'm planning to get this camera as soon as possible.
I'm sure there are more features that will appeal to others.
Edited by ericbowles, 12 August 2017 - 06:33 AM.