JerryF
Member
Yes the 20FPS limitation is not a Nikon thing. Its everyone's problem that uses higher MP sensors. Even the A1. The fastest cards available today simply are not fast enough to handle the data rate required without compression.
Here is something I posted on Ken Wheelers YT ridiculous rant about the Z9.
" A little simple math will help to put some perspective on things here I think. First I used my D850 which has the same size sensor as the Z9 to create 3 files of the same generic scene. An uncompressed RAW used 95,895KB, a lossless compressed RAW used 56,133KB and a lossy compressed RAW used 49,837KB. Assuming you are shooting at 20FPS this equates to 1.917GB/s for uncompressed raw. Which exceeds by a wide margin the fastest CFE card available which are about 1.5GB/s. So basically no camera on earth could continuously shoot at that rate as it is a physical impossibility with the cards available. Using Nikon's lossless compressed method (assuming the Z9 uses the same lossless compression algorithm as all other Nikons) the rate would be 1.122GB/s assuming NO cpu time required for the compression and NO filesystem overhead writing to the card. So it would be completely understandable that this could hit the limit of the cards performance when the overhead is added. This would explain why Nikon has two new compression methods. They had to develop them to allow saving at a rate that current CFE cards could handle. My guess is that the medium compression mode minimally effects the image quality but I won't know that for sure until I get my hands on one. These are simply physical limits that can't be solved by other companies like Canon and Sony either. "
My pre-order for the Z9 is staying right where it is for now.
Here is something I posted on Ken Wheelers YT ridiculous rant about the Z9.
" A little simple math will help to put some perspective on things here I think. First I used my D850 which has the same size sensor as the Z9 to create 3 files of the same generic scene. An uncompressed RAW used 95,895KB, a lossless compressed RAW used 56,133KB and a lossy compressed RAW used 49,837KB. Assuming you are shooting at 20FPS this equates to 1.917GB/s for uncompressed raw. Which exceeds by a wide margin the fastest CFE card available which are about 1.5GB/s. So basically no camera on earth could continuously shoot at that rate as it is a physical impossibility with the cards available. Using Nikon's lossless compressed method (assuming the Z9 uses the same lossless compression algorithm as all other Nikons) the rate would be 1.122GB/s assuming NO cpu time required for the compression and NO filesystem overhead writing to the card. So it would be completely understandable that this could hit the limit of the cards performance when the overhead is added. This would explain why Nikon has two new compression methods. They had to develop them to allow saving at a rate that current CFE cards could handle. My guess is that the medium compression mode minimally effects the image quality but I won't know that for sure until I get my hands on one. These are simply physical limits that can't be solved by other companies like Canon and Sony either. "
My pre-order for the Z9 is staying right where it is for now.