Practice question · Numerical answer
A 24-megapixel sensor records 14 bits at every photosite. How large is one uncompressed raw file, in megabytes, taking a megabyte as one million bytes?
Hints
- Multiply the number of photosites by the bits, then convert bits to bytes.
- 24 million times 14, divided by 8.
Show the answer
42 (answers within ±1 count)
Why
42 MB. 24 million photosites at 14 bits is 336 million bits, and dividing by 8 gives 42 million bytes. Note that this is one value per photosite, not three: a demosaiced 8-bit TIFF of the same picture is 72 MB and a 16-bit one is 144 MB.
Practise Digital Capture and the Input-Output Chain
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