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

Started Feb 6, 2014 | Discussions thread
Krich13 Contributing Member • Posts: 757
Re: I'll help you...

Erik Magnuson wrote:

Lab D wrote:

If you want to compare the 24-70mm lens to a 24-80 lens with a special macro-like optics and a manual focus ring,

All of those lenses have focus-by-wire manual focus rings. Max magnification is .3x (12-40) vs. .2x (24-70). There is still 1-stop of DOF control missing from the 12-40 or 12-35.

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Well, these x0.2 and x0.3 magnification factors are those of the lenses themselves. Sensor size makes a big difference though: Olympus magnification is like x0.6 in FF terms. A 2-cm tall bug would fill the frame (height wise) of an m43 camera when used with Oly 12-40 lens, but only occupy 1/6 of a frame height if imaged by Sony A7(R) and Zeiss 24-70. Even the pixel count of A7R can't compensate the difference in magnification.

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