I have searched the archives here and did an internet search, but surprisingly I could not find a consistent chart or calculator for memory card image capacity. I also tried the San Disk website. The camera is a Nikon D 850 (45.7 MP), I shoot Raw 14 bit uncompressed. I did find a detailed chart that only went to 22 MP but had "uncompressed RAW" denoted as "24 bits per pixel" and a image size for this indicated as 66 MB. I do not know if the chart's "bits per pixel" can be proportionately reduced to 14 bit or if this is even a correct equivalency. Presuming "bits per pixel" is equivalent to "bit depth," then the chart values need to be multiplied by .58 (14/24) for a file size of 38 MB and then times 2.1 to get from the chart figure for a 22 MP camera to my 45.7 MP Nikon, or a file (image) size for my camera of 74 MB. A 64 GB card would then, based upon the above, hold 479 14 bit uncompressed 45.7 MB images. I realize, if calculated correctly, this is only an approximation, but I was just looking for some approximation. Any thoughts, comments, corrections or perhaps better yet a link to a chart that allows for input of values upon which calculations can be made? Thanks.

I have searched the archives here and did an internet search, but surprisingly I could not find a consistent chart or calculator for memory card image capacity. I also tried the San Disk website. The camera is a Nikon D 850 (45.7 MP), I shoot Raw 14 bit uncompressed. I did find a detailed chart that only went to 22 MP but had "uncompressed RAW" denoted as "24 bits per pixel" and a image size for this indicated as 66 MB. I do not know if the chart's "bits per pixel" can be proportionately reduced to 14 bit or if this is even a correct equivalency. Presuming "bits per pixel" is equivalent to "bit depth," then the chart values need to be multiplied by .58 (14/24) for a file size of 38 MB and then times 2.1 to get from the chart figure for a 22 MP camera to my 45.7 MP Nikon, or a file (image) size for my camera of 74 MB. A 64 GB card would then, based upon the above, hold 479 14 bit uncompressed 45.7 MB images. I realize, if calculated correctly, this is only an approximation, but I was just looking for some approximation. Any thoughts, comments, corrections or perhaps better yet a link to a chart that allows for input of values upon which calculations can be made? Thanks.

I am using a 512 GB SD card for 14 bit uncompressed NEF files and a 240 GB XQD card for Fine/Large JPEGs. These balance just about perfectly and will hold 3200 or 3300 image files. Video also goes to the XQD. I don't shoot bursts except rarely, and never more than what the camera buffer will hold, so I've never had a performance issue because I'm set up this way.

Gene--if one shoots bursts, the camera still has to write the uncompressed data to the buffer, then compress it, then write to the memory card. The process is measurably slower than simply writing uncompressed data.

If your work style would not suffer, some cameras allow the user to cap the size of the burst. Since I use the HS max burst speed only as insurance against camera shake in handheld exposures, I set the cap at four frames.

On a Z6 with a CFexpress card this takes about a half second at the slow dim light shutter speeds where I use HS burst to back up the IBIS. Usually only one frame has camera motion blur, but sometimes it’s the first frame, so this is a good idea. Very occasionally only just one frame is acceptable. All in all, four frames seems the right cap for my dim light work.