D80 RAW file size

luxun54 · Sep 11, 2006

I am noticing wide variation on RAW file size on D80. I have gotten out-of-camera files between 6.9MB to 10.3MB, a range of nearly 50%. On my D70, file sizes were between 4.8MB-6.1MB, a range of about 25%.

My RAW files modified in Capture NX range between 9.4MB-14.0MB. One file went from 7.8MB to 13.2MB after editing in NX. The The same set of edits in NX seems to produce very different proportional effects on file size for different files.

Any ideas?

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luxun54 · Sep 11, 2006

Any thoughts out there on why the wide variation? Does it have something to do with additional megapixels?

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Zohn Smith · Sep 11, 2006

I'll hazard a guess here. The more "simple" your images are, i.e., uniform backgrounds, uniform textures, etc. the more "compressible" the pictures are for the compressed raw format. Similarly, the more "complex" your images are, i.e., busy backgrounds, varied textures, etc. the less compressible. That should explain the range of file sizes you see. As you go higher in the sensor densities you will see larger range of sizes and therefore the 6 MP sensor gives you a smaller range of raw file sizes compared to the 10 MP sensor.

tuulelohe · Sep 12, 2006

if you open a RAW file in Capture NX and just hit "Save/Save as..." NX will replace NEF's inner "basic" JPG with a "fine" JPG which immediately increases file size

want to test? go ahead: http://drchung.new21.net/previewextractor/

utterly stupid behaviour if you ask me...

sepp
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LeftSpin · Sep 12, 2006

As I remember, the D50 was "12 bit compressed" raw format.

What does the D80 do?

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LeftSpin

tuulelohe · Sep 12, 2006

LeftSpin said:
As I remember, the D50 was "12 bit compressed" raw format.

What does the D80 do?

the same, i think, since file sizes staight from camera were approx. 10MB and at the same time D200's files were approx 16

i own d70 actually, just tested d80&d200 for a minute...

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Rokey · Sep 12, 2006

I don't know why the file sizes would vary like that, but I have certainly noticed the effect of the larger file sizes. I like to shoot in RAW + jpeg and it's great that the D80 lets you do that with jpeg fine, not just basic as with the D50.

But between that and the extra MPs, I now only get 54 shots on my 1Gb card where it used to be way into three figures. I rarely had to think about it but now it is a real constraint. Going to have to research which larger SD cards work well with the D80, and pay out more cash.

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Chris

luxun54 · Sep 12, 2006

Rokey said:
I don't know why the file sizes would vary like that, but I have
certainly noticed the effect of the larger file sizes. I like to
shoot in RAW + jpeg and it's great that the D80 lets you do that
with jpeg fine, not just basic as with the D50.

But between that and the extra MPs, I now only get 54 shots on my
1Gb card where it used to be way into three figures. I rarely had
to think about it but now it is a real constraint. Going to have
to research which larger SD cards work well with the D80, and pay
out more cash.

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Chris

Since I was upgrading from D70/CF cards, I needed to buy new SD. I had anticipated some increase in file size, and bought 2GB Lexar 133x as primary, with 2GB Kingston ElitePro as economy back-up, both with recent rebates. In RAW only mode on D80, each holds 162 shots. Lexar is working well and fast, haven't tested Kingston yet. Lexar came with bonus USB SD card reader, which was good for me, since I was coming from CF.

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D80 RAW file size

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