Crop Factor, Low Light and Aperture with m4/3 lenses? Part 2

Started Jun 16, 2014 | Discussions thread
Just another Canon shooter
Just another Canon shooter Veteran Member • Posts: 4,691
Re: Crop Factor, Low Light and Aperture with m4/3 lenses? Part 2

knickerhawk wrote:

But look what happens when we set the respective dxo score maps at equivalent aperture settings:

That tells a rather different story than the basic score, doesn't it?

It tells you the story about a company which decided to dumb down the way to present their measurements in order to appeal to the "ordinary public"; in a rather successful way, apparently.

Did you notice that those charts are "accutance maps", whatever DXO means by that, measured in percentage of something (DXO decides that it is too much to tell us because they believe that we are not intelligent enough to understand it)? If you compare them in another undocumented metric, P-Mpix, those charts look like this:

12-40 on EM-1 vs. Nikon 24-70 on Df. The f-stop scale is in m43 eq. units

What does it tell us (in the Mpix metric)? First, the m43 combo has a huge gap - cannot do f/2.8-f/5.6 (the vertical axis is in m43 units, not FF ones). Of course, we knew that but this is the elephant in the room which should be noticed from time to time. Next, in the aperture range that the m43 combo can do, it is mediocre. In the very wide end kinda gets close somewhere around  f/5.6 (in FF terms) and that's about it.

 Just another Canon shooter's gear list:Just another Canon shooter's gear list
Canon EOS 5D Mark II Canon EF 15mm f/2.8 Fisheye Canon EF 35mm F1.4L USM Canon EF 50mm f/1.2L USM Canon EF 135mm F2L USM +4 more
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