Why the Fujifilm X-H2 Beats X-T4 in AF Tracking despite Having Lower AF Calculation Frequency
Thomas B. Jones and Andreas Jürgensen were in New York and had a press-meeting during the last X summit, where Fujifilm mentioned little tidbits that they did not touch on during the official X summit.
Luckily for us they made a video about it, which you can see in German down below or read summed up in English below.
- X-H2 and X-H2S are both rated for 500,000 shutter actuations
- object detection is exactly the same on X-H2S and X-H2, so both cameras recognize objects with the same efficiency, because that’s made possible thanks to the new processor, which is identical in both cameras
- the real difference between X-H2 and X-H2S lies in the reading of the autofocus information for tracking purpose. When high speed tracking of objects, then you’ll notice a difference in favor of the X-H2s
- Autofocus Calculation Frequency:
– X-H2S: 120fps
– X-H2: 26fps
– X-T4: 40fps
- despite the X-H2 having a lower AF calculation frequency, it is anyway better than the X-T4, because of the new AF algorithm that can make predictive calculations on where the subject is going to move
- that’s why the tracking on X-H2 is superior than X-T4, even if X-H2 makes less AF-calculations
- X-H2 has more precise AF than X-H2S, as it has more phase detection pixels. In subjects with very fine details, this means that the X-H2 locks on them more precisely (we reported here). But if it was about tracking those subjects, the X-H2S would have again the upper hand.
- at 26MP you don’t notice if the AF is minimally off, but at 40MP you’d start to notice it. Hence X-H2 has to be even more precise
I found the autofocus part particularly interesting and especially to see how powerful the new AF algorithm is in combination with the new X Processor 5. So much so that it even makes up with smartness for the slower AF calculations on the X-H2.