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Message: <blockquote data-quote="Chosun Juan" data-source="post: 3608616" data-attributes="member: 92780">If I understand correctly, the hi-res photos Nikon posted are RAW converted to Jpegs using the bundled software. Seeing that the 500mm f4 + 1.4xTC is a pretty sharp setup (and quite typical of what will be used in practice, if not even conservative - I know a few who use 1.7 or 2xTC's with 5 and 600 f4's) , I think I still would have expected more detail in the WBSE, particularly in the white on top of the head and back of the neck, given where the histogram sits, and given the exif data of a low ISO 400, aperture stopped down some to f6.7, and  1/3000th of a second shutter speed.  ?:brains:?I  have been digging around a bit, and some early DR/ ISO/ SNR data (or constructions thereof) seems to 'clarify' some of the Nikon execs remarks.   :smoke:As I suspected   :t:  , the full stop improvement in ISO performance applies ONLY to the extended top end. ie.the performance of the new D850 at ISO 25600 is the same as the old D810 at ISO 12800.The performance at the lowest end of the ISO range is the same despite the hike in resolution, and there are gains of ~ 1/3 to 1/2 stop in the mid range. So rather than lobbing somewhere in the range between the  D750 and challenging the D5 in the midrange, as I had hoped, it looks like it might approach (or match) the D750 midrange performance. Time with production models and standardized testing will tell, but it looks like an improvement on the D810   :cat:Some more emerging data here on this thread by Bill Claff of  (<a href="http://www.PhotonsToPhotos.net" target="_blank">www.PhotonsToPhotos.net</a>) over on DPReview:  <a href="https://www.dpreview.com/forums/post/60035567" target="_blank">https://www.dpreview.com/forums/post/60035567</a>Despite all the p**-p**ing on the interwebs by the Mirrorless /Video crowd, I think it is quite an exciting 'all-in-one' photography camera, and I look forward to getting my hands on one. I suppose whether it stays there depends on how well it actually tests, how I find the feel in the hand, how much of a 2500+ ISO improvement it shows over the D500, and how well the DX performance stacks up (mid range ISO performance, AF coverage and performance, and viewfinder experience), and if the focus stacking feature works in long range photography for me ..... and of course I'm going to have to dig up some sort of a deal - coz I ain't payin' retail in Oz !   :storm:I think I will still be 90% birds, but the better grip and balance of the heavier D850 (over a D7200) should work well with big Super telephotos and the prospect of it also being a top notch landscape tool too, is pretty tantalizing!  :king:Chosun   :gh:</blockquote>

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