A Request for 40-150 2.8 Pro Owners

Fri13 wrote:

Airmel wrote:

Fri13 wrote:

I have done those tests, without any kind difference in CDAF. PDAF instead failed as I stated.

As I said, this is very easy to demonstrate if you will simply open your mind.

If my mind is open, I have done tests and found no difference at all. What is then the problem?

Sounds like your beliefs are clouding your judgement.

The CDAF doesn't care what direction lines are as it doesn't triangulate distances, just contrast.

You are making invalid assumptions about CDAF. Obviously, CDAF doesn't provide error direction information like PDAF does. However, you seem to think that the software routines responsible for evaluating the CDAF information give equal weight to processing of horizontal and vertical detail. This can be easily disproven with the simple test which I described earlier.

And as I said, I have no difference at all what ways I rotate camera, it is always fast and accurate with CDAF.

As I posted previously, this behavior is EASY to reproduce, provided you utilize an otherwise featureless target which only contains vertical detail (a single vertical line in my case).

Incidentally, if you perform the same test with an E-M5 or E-M5 MkII (cameras which only use CDAF), you will see the same AF preference for vertical detail.

I made the tests with E-M1 with just CDAF and got no differences at all. Fast and accurate in both ways. But as I said, PDAF was affected in horizontal lines.

In about five minutes I performed the 90 degree rotation test with an E-M1, E-M5, E-M5 MkII using 40-150mm Pro, 75mm f1.8 and 12-40mm Pro. All combinations performed just as I described in previous posts. With the test target aligned vertically, focus acquisition is very fast and nearly immediate 100% of the time. With the test line aligned horizontally, focus acquisition is less predictable, sometimes requiring a hunt back and forth for a second, other times a little longer.

If you don't believe my cold, hard data, then riddle me this - Why is the same vertical detail warning included in the E-M5 and E-M5 MkII Manuals when these models only utilize CDAF?