Corner tests for 16-35 f/4 vs. 16-35 f/2.8 (v.1) vs. 24-70 f/2.8L II

Started Jul 4, 2014 | Discussions thread
Just another Canon shooter
Just another Canon shooter Senior Member • Posts: 4,691
Re: Corner tests for 16-35 f2.8 MkII

Jay A wrote:

Just another Canon shooter wrote:

Jay A wrote:

If a corner from one lens looks better than the same corner from another lens...ALL ELSE BEING EQUAL, then the one with the better corner handles corners better, no?

No. It means it does it better in this case. It does not tell you what happens if you use each lens in an optimal way. Also, it does not tell you how big the difference is when you do it properly.

For example, the 24-105 handles corners better at 24mm than the old 24-70 when focused at infinity (because, according to PZ, the 24-70 is horrible at the corners at 24mm while the 24-105 that I own is just bad) but I can never get the good corners of the 24-70 when focused at 2m with my 24-105, no matter how deep I focus (but I can optimize the sharpness by choosing the right focal plane).

Well then based on what you are saying, there hasn't ever been a test done that is valid because none have ever covered ALL SCENARIOS that a particular lens may be used under. For that matter, all the test target tests such as those done by the-digital-picture are useless because they test at the same distance all the time regardless of whether or not the particular lens being tested is any good at that distance.

All tests done in UWAs lenses in PZ (at about 48cm, FL=16mm) are basically, useless, you are right if this is what you want to say. I wish those two lenses here really performed as what you see there, in the corners. Unfortunately, they do not. If you believe that TDP reflects real life scenarios, then you can hardly tell the new 16-35 apart from the 17-40 at f/11 (and they do not test the extreme corners anyway).

You are missing the point of my remark because you are too lazy to read the thread. I am NOT talking about shooting a chart and moving to a different point - I am talking about choosing the focal plane. Kinda hyperfocal, 1/3 into the scene, etc.

Maybe the only valid test would be the one done at every single aperture and each aperture shot at every possible shooting distance, and each of those with every possible body that the lens might be used with, and then with both OIS turned on AND turned off.......I can go on and on if I want...but I don't think we are talking in practical real life scenarios here.

The practical scenario is to do what the OP did but choose the focal plane optimally. Just read the thread. It takes less time than posting evidence that you did not.

 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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