Its official. Oly AF sucks!

Started Sep 11, 2013 | Discussions thread
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Re: I would be absolutely shocked...
In reply to Beach Bum, Sep 13, 2013

Beach Bum wrote:

PerL wrote:

esco wrote:

Pentax, Sony, Olympus id say they're all pretty similar in AF performance. Its easy to think of Olympus as only being sub-par but the af-modules and lens motors on the above brands aren't too hot either!
Photographer first, gear second

The AF-C on the Canon and Nikon prosumer models has constantly been better than those from competing models from other brands like Pentax, Olympus or Sony. They probably use the experience they have from the pro series. They put in more resources on AF R&D and have better know-how.

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I would be absolutely shocked (stunned really) if Canon or Nikon had better autofocus on their price competitive DSLRs than Sony.

Judging AF performance is very hard, because little of it is about specs. Most systems will focus pretty accurately and quickly if there is some pattern under the focus point and the subject isn't moving. From there on, it's downhill, and the shape and steepness of the slope can be unpredictably different. I have four DSLR's of three different brands with radically different AF systems. For static subjects really you can't tell much difference (well, so far as the different lenses let you predict which part of the performance is the camera). By far the most sophisticated of my cameras is the D800's 51 point, and certainly it works much better than the others with unpredictably moving subjects, low light and so on, but also it's trick, choose the wrong settings for a situation and you can make it work worse than the simple systems. So, I would always hesitate to make sweeping statements about AF systems.

Admittedly, I know nothing about Pentax. But, with regard to Olympus, they've been out of the mirror box market for a while, and it's well-known that the on sensor PDAF isn't up to the speed of the dedicated PDAF sensor yet, so it's absolutely no surprise that Canon or Nikon would beat out a two year old true DSLR by Olympus.

But Sony is still producing true DSLRs, and, like I said, I'd be shocked if you have any evidence of either Canon or Nikon having better autofocus.

Sony certainly doesn't any more make 'true DSLR's'. What they make are EVIL's with DSLR similar AF systems. As for Canon or Nikon having 'better AF', the AF of the tope end SLT's is lesser specified than Nikon or Canon's second tier AF. As to how it actually performs, I couldn't say, but AF performance is one of the most fiercely fought part of the competition between Canon and Nikon. Since Sony isn't a player in the top-end PJ market where that battle is fought out, it would be strange if Nikon and Canon's engineers had done worse. Certainly Canon's new 61pt AF system seems to be a blinder.

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