Size comparison of FE 4/2470 on A7 vs Olympus 12-40 f2.8 on GX7

Started Feb 6, 2014 | Discussions thread
viking79 Forum Pro • Posts: 14,149
Re: Why compare the larger M43 lens and not the one with the same range?

Lab D wrote:

Maybe it is what you had on hand. FYI, The Panasonic would be a better lens to compare since it is also only 24-70mm.

The panasonic is not 24-70mm, it is 12-35mm. Just like aperture, focal length is a property of the lens and doesn't change. The lens will always be 12-35mm.

If you insist on turning into equivalent field of view, then a 24-70mm used on full frame would give the same field of view, and at f/5.6 it would let the same amount of light through (4x less intense over 4x the area = same amount of light).

In your example, the two people get sun-burned the same amount, but which one had more skin sunburned?


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