comparing focal length equivalency regarding MP

Started Feb 24, 2013 | Discussions thread
mike703
Veteran MemberPosts: 5,887
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Re: comparing focal length equivalency regarding MP
In reply to Bob6771, Feb 24, 2013

Bob6771 wrote:

Not sure if my question is correctly framed but here goes.

For example if a M 4/3 sensor with 16 mp is compared to a M 4/3 12 mp sensor and both cameras have a 28 x 84 mm equivalent lens and I crop the 16 mp image to 12 mp does the cropped image provide a 25% increase in comparative focal length?

You would need a 15% increase in focal length (square root of 16 / 12 = 1.15) to achieve the same framing as cropping 16MP to 12MP.

Best wishes

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