[JJ_SO]

Update on the "mRAW" and "sRAW". Apparently, Nikon has changed what that entails, on the D850.

 

Now, they are actually 12 bits "RAW".

 

Iliah Borg looks into the files with Raw digger and found that D850 RAW has 8,288 x 5,520 pixels in the RAW file. M has 7,104 x 4,728 pixels, S has 6,216 x 4,136 pixels.


Nikon RAW files get converted into 8,256 x 5,504 pixel images. (this always happens, many border pixels go *poof*).

The M ones get converted into 6,192 x 4,128 pixel images, some serious downsampling still going on there during conversion.

The S ones get converted into 4,128 x 2,752 pixel images, even more serious downsampling going on.


I am sure they have a reason for the 2nd downsampling during conversion. However, to me it seems to partly defeat the reason to shoot mRAW and sRAW (file size).

 

Any ideas why they would use 2 downsamplings (meaning, the second downsamples the first)? I would see it more logical (if downsampling is a need for anybody) to downsample the max size one time to the target size.

 

However, to me it appears pretty stupid, these different "RAW"-files, I simply don't see a purpose in buiyng a high MP count and then  downsample it again.  At first, it appears nonsensical. But then, marketing and sense are two different worlds.  ^_^

 

You already found out for what the use the backlit sensors? The camera basically has two layers of circuits, one has a low gain to get base ISO 64, the other becomes active from ISO 400 with a higher gain. Therefore an improvement in high ISO. So far I only saw ISO 4000 max. which was okay but not enough for my needs. I wonder how it behaves at ISO 12.800 and higher.

 

Just found something on Nikon rumors: https://nikonrumors.com/2017/09/16/nikon...-iso.aspx/

 

Not too shabby