On 31/12/2013 11:05 AM, steve harley wrote:


this measure has value if you understand its limits; a simple
counterexample is a subject in front of a foliage background - if your
AF misses the subject and focuses on the foliage, the JPEG will have
lots of _undesired_ fine detail and thus it will be less compressible


So one could use it for determining degree of back focus.......

bill

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