Nikon D800 + CF 32 GB ... 400 shoots...

[Phyramide]

Hello,


Could You please help me: My logic seems to fail on this:


I've bought a Scandisk 32 GB Extreme CF card for my Nikon D800. I use CF card as a number one card writing RAW in it and ScanDisk 16 GB SD in the second slot for JPF (FINE L). Nikon D800 shows that 400 frames (shoots) are available. When I see the size of the file i get it is around 47 mb (NEF 14-bit lossless compressed). So if I multiply 50mb x 400 shoots = 20000mb ... I do understand that 32Gb is not 32000 mb... a rather something around 30000 mb but still where does the rest 10000 mb go? In my simplifued math it should me around 700 NEF files for a 32 GB card. As the JPG file size is 15 mb so it is 3 times smaller than NEF ... so the 16 GB SD should be fine as a second card for the 32 CF card.


Could You please say where I'm wrong?


PS one more strange thing... If I take the SD card out and put D800 to shoot only RAW ... it shows me 199 shoots???
What is wrong?


Thank You in advance!

 

[djacobox372]

Hello,

Could You please help me: My logic seems to fail on this:

I've bought a Scandisk 32 GB Extreme CF card for my Nikon D800. I use CF card as a number one card writing RAW in it and ScanDisk 16 GB SD in the second slot for JPF (FINE L). Nikon D800 shows that 400 frames (shoots) are available. When I see the size of the file i get it is around 47 mb (NEF 14-bit lossless compressed). So if I multiply 50mb x 400 shoots = 20000mb ... I do understand that 32Gb is not 32000 mb... a rather something around 30000 mb but still where does the rest 10000 mb go? In my simplifued math it should me around 700 NEF files for a 32 GB card. As the JPG file size is 15 mb so it is 3 times smaller than NEF ... so the 16 GB SD should be fine as a second card for the 32 CF card.

Could You please say where I'm wrong?

PS one more strange thing... If I take the SD card out and put D800 to shoot only RAW ... it shows me 199 shoots???
What is wrong?

Thank You in advance!

Most if the quality modes are compressed, so the camera can't predict exactly how many photos are left and Nikon appears to errror on the side of caution.

 

[gconnoyer]

Yeah its just a "guess" by the camera.
On my 16GB card, shooting in raw, it says I get 741 images....about 100 or so into it, I've only wittled the count down to about 700