Nielk Mike wrote:
gyoung143 wrote
Nielk Mike wrote
Dan, the community here is very different from other fora, English or German. Here, the miniMF takes a lot more space than anywhere else. For me, there is no need to convince anyone that Fuji AF-S has issues. If the AF works for someone, great!
For me, the difference between using my a7cr and my X-E5 is: With the Sony, I just aim and let the camera do the AF. With my Fujis, I use MF, and if I use AF, I always check what the distance indicator shows. That is a very different experience. it makes me use my Sony for social events. No doubt, my Fuji would return 95% sharp images, too. But I just don't trust the AF (for a reason). The good thing is: Most of my shooting is slow out in the streets and countryside. It affords me the time to manually dial in focus. And over time, it has become part of why I like to use my Fujis.
What I don't understand to this day is what causes the AF-S issues. It is mostly confined to WA lenses wider than 35mm, and worse when stopped down. So my guess is that is has something to do with how the camera identifies critical focus when there is a more or less deep area of "sharpness", like when stopped down with a large DoF, or with WA lenses which have a wider range of sharpness in the distance even wide open.
When I received my X-E5, the first thin I did was testing my 14 and 16 mm lenses for the AF-S inconsistencies and the Focus Beyond Infinity. It showed the same behavior as my X-T3, X-Pro3 and X-E3.
But lets not take this further. Those who have encountered the issue either blamed themselves, sold their Fujis or learned to live the limitations. For me, making sure the camera has set focus correctly has become second nature with my Fujis. I think you attach far too much importance to the readout on the on screen distance scale when used in af-s with wide angke lenses. There was a long discussion here about this some time ago, and the issue was put to Fuji in Japan I think, by someone with 'connections' but I don’t remember any response. It doesn't take much experience to see that the scales are inaccurate with lenses wider than 23mm when used with af-s, readings quite random, and at variance with the actual focus point,which in my experience is right most of the time. As much accuracy as can be expected when DoF is great and the amount of movement of the lens group is so small as it inevitably is with short focal lengths.
I repeat though that when used with MF and for scale focussing I am happy with using them, and no other system has anything as useful.
The stopped down inaccuracy too has been commented on, likely due to Fuji choosing to use the lens stopped down when using af-s. The work around,if you really need af on a low light subject and f/16, is to use BBF, when Fuji seems to use max aperture for focussing. Heaven knows why tge distinction.
Gerry The Distance Scale returns pretty accurate information. But some wide angle lenses (the 14 mm) and all zooms I have owned don't reach infinity focus when the indicator is underneath the infinity symbol. Infinity focus with those lenses lies in front of the infinity symbol. With all my primes (except the 14mm), the Distance Indicator is spot on.
You mileage obviously varies, as they say. My observations of using my 14mm on Xpro2 and Xt3 since my early days with Fuji is that the indication is unreliable when af-s is used. You can focus several times on the same point in a scence and get a different reading each time, but I am satisfied that the actual focus point is the same, within minor and acceptable variation. Same thing happens with my 18-55 when on 18mm. 23mm f/2 I have behaves much more consistently.
Gerry