07-27-2015, 09:00 AM
I'm curious: What kind of magic do you expect? If a lens is not up to your expectations at half the resolution, all flaws will first double (roughly) and with downsampling come to the same result as you already have.
Also, the motivation for retesting on 50 MP is kind of tricky. A couple of lenses will look worse, so you won't buy the lens or if you alrerady have it, won't buy the camera.
When D800 came out, there was a debate wether PZ should or should not update to this HR camera. Reason not to do was "only 50% plus of resolution doesn't mean enough to justify the costs - and the former test wouldn't be comparable", if I recall correctly.
Do you know the site lenscore.org? They do test on a 200 MP sensor with some kind of adaptor. Good thing is, this sensor is the same for all lenses (Canon, Nikon, Sony, Sigma, etc.) and the bad thing is, some people find they are not transparent in their test scenario and all those numbers are bullshit. Same as with DxO.
I think even if the numbers are of strange origin, the origin is always the same and then comparable.
Also, the motivation for retesting on 50 MP is kind of tricky. A couple of lenses will look worse, so you won't buy the lens or if you alrerady have it, won't buy the camera.
When D800 came out, there was a debate wether PZ should or should not update to this HR camera. Reason not to do was "only 50% plus of resolution doesn't mean enough to justify the costs - and the former test wouldn't be comparable", if I recall correctly.
Do you know the site lenscore.org? They do test on a 200 MP sensor with some kind of adaptor. Good thing is, this sensor is the same for all lenses (Canon, Nikon, Sony, Sigma, etc.) and the bad thing is, some people find they are not transparent in their test scenario and all those numbers are bullshit. Same as with DxO.
I think even if the numbers are of strange origin, the origin is always the same and then comparable.