What about using RAW mode ?
- RAW mode has the same 3888x2592 pixels as JPEG but avoids the lossy
compression of JPEG. However, since RAW requires 22.9MB/image, and JPEG
is 2.2MB/image, there are storage costs.
- These images show a TIF conversion of the RAW 40D file which avoids
the distortion (compression artifacts) of JPEG.
- So, under the same conditions as the JPEG images, RAW shows 50%
readability at 47x47pix for an Effective Camera Clarity of 6.2Mpix.
- So, JPEG only decreases image clarity by 10% but costs over 10x in file size ?
- Not quite ...
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40% 43x43 pix
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50% 47x47 pix
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60% 53x53 pix
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70% 57x57 pix
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