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

Started 10 months ago | Discussions thread
viking79
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Re: apples and oranges
In reply to Dennis, 10 months ago

Dennis wrote:

Emacs23 wrote:

I bet 24-70 is better. Larger sensor — easier to design.

Since when ?

A7 has 4000 pixel high image and 24mm page height, or 2000 line pair high image and 24mm = 83 LP/mm.

E-M1 has 3456 and 13mm page height, or 133 lp/mm requirement.

Which do you think is harder to design a lens for? A sensor that requires 133 lp/mm or 83 lp/mm? Even A7R has only 103 lp/mm requirement.

To look at this another way, pretend I wanted to get a "16 MP" image out of the camera.  For the E-M1 that would require 133 lp/mm, but a lens with only 68 lp/mm would be fine on A7 or A7R.  This is very low and easy to design, where 133 lp/mm is getting exceedingly difficult and expensive.

Eric

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