A7r 24-70 at 70mm vs EM1 12-40 at 40mm (80mm EFL)

Started Mar 6, 2014 | Discussions thread
OP LTZ470 Forum Pro • Posts: 11,926
Re: A7r 24-70 at 70mm vs EM1 12-40 at 40mm (80mm EFL)

bigley Ling wrote:

blue_skies wrote:

LTZ470 wrote:

blue_skies wrote:

Oly 12-40 Pro showing M20 and M60

Nice try Henry, but this is the 12-40 f/2.8 I am using the graph you have posted is for the 12-60 Oly...

Pretty sure it says 12-40 on top line and 12-60 on bottom line in the charts...

Yes, but you can see the real difference in the MTF Graphs I posted above...night and day...at f/2.8 the Oly 12-40 makes the 18-55 kit lens look poorest at f/8...

yes I also took test shots at 33mm and 32mm on A7r and EM1 respectively, and will post results later...

How do you process? RAW, JPG? Tried both?

Can't best the Oly jpegs SOOC...jpegs only for me...

Nope, not a focusing problem, corner and side blur due to distortion...hard to correct with a lens so small...

Could be A7r specific - I am actually impressed with how well the A7 holds up with the 28-70 kit lens:

Agreed I am thinking the same sensor issues as the Nex-7 and some lens...are you going to get the 24-70?


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how can it be both 12-40 and yet 12-60 though? These are both very different lens available from Olympus. Maybe a typo somewhere? Whatever it is, the images posted by LTZ470 clearly shows the ultimate resolving power of the A7r when it comes to center performance, and shows the excellent overall resolving power from the 12-40 pro on m43 platform.

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