X100 RAF filesize

[Arjay]

I read somewhere that the X100's RAW (RAF format) files are very large, much larger e.g. than on my DSLR that features roughly the same resolution.

My Nikon D300 (resolution 12.2 Mpixel) produces NEF format RAW files of 9.8 to 11MB. The X100 (resolution also 12.2 Mpixel) apparently produces RAF files or 17 to 19MB.

Can anyone elaborate on why these RAF files are so much larger than other RAW files of other cameras with equivalent sensor resolutions?

PS: I'm beginning to understand why Fuji has included a RAW button on this camera ...

 

[DFNDRMP]

Arjay,

My D2x (~12mp) files are around 19mb, while my D200 (~10mp) files are around 15mb. Are you shooting compressed RAW files?

 

[Arjay]

That could be an explanation - I am using 'lossless compression' and 12 bits of color depth.

Do we know anything about Fuji's approach to compress RAW data, and about their color depth?

 

[willie_901]

I do know one of the 19 MB RAW files made available for download was a RAW + jpeg file. This would account for 4-5 MB of the 19 MB.

I do not know if Fuji supports any sort of compression, nor do I know the bit depth. I do know I will shoot in RAW + jpeg until Adobe Camera RAW supports the X-100.

 

[Catto]

I have a bunch of .raf files here from the testing I did with the pre-production X100, and they are all 19.9MB regardless of content, ISO setting, etc - which suggests that there's no compression being used.

They all include a half-res .jpg (1448 x 2176 rather than 2848 x 4288) - full size .jpgs range between 3.8 - 5MB each.

Hope that helps,
R

 

[ottluuk]

My 10MP Canon 40D can crank out a 19MB CR2 if you shoot a detailed and textured flat object with a sharp lens (around 12MB is usual in normal situations) so I guess if the Fuji's file is uncompressed, a 19MB file would not be surprising at all.

 

[shashinka-ichiban]

I remember my first hard drive only had 10mb. Now a single digital image doubles that hard drive. Anycase,m I recall the RAF files on my S2 were much larger than on my Nikon of the same size.

 

[Catto]

I remember my first hard drive only had 10mb.

You had a hard drive?! We had 143kb single-sided floppies - and I didn't hear anyone complaining...
R!