Why no D800 M-RAW equivalent to Canon?

Started Mar 4, 2014 | Discussions thread
noirdesir Forum Pro • Posts: 13,561
Small RAW almost same file size as 12-bit fullsize compressed RAW

jfriend00 wrote:

diverroy wrote:

Why? The canon sRaw is not true RAW as it throws away information to make the file smaller.

The D800 has many options that makes the file smaller keeping all the information intact.

What full sensor options for smaller sizes other than pre-baked 8-bit JPEGs, does the D800 have?

The point of reduced RAW format is to still be able to shoot full sensor, still retain most of the adjustability advantages of RAW, but not be burdened with such large file sizes in processing.

D4s manual:
- 14 bit uncompressed raw: 4928 × 3280 -> 33.6 MB
- 12 bit lossless compressed raw: 4928 × 3280 -> 15.4 MB
- 12 bit compressed raw: 4928 × 3280 -> 14.1 MB
- 12 bit small uncompressed: 2464×1640 -> 13.1 MB

So, for saving 1 MB, you loose 75% of the pixels (in terms of resolution) and most likely loose control over the demosaic process. Yeah, it's hard to understand why there has not been more vocal demand for this.

The only thing this presumably helps with is processing speed (but if you have a raw converter that offers a similar 2x2 binning, that point is moot as well).

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