01-03-2016, 03:38 PM
JoJu,
I'm surprised by the vast range of different AFMAs that are needed for your Sport, my Tamron gets along fine with just -2 at all distances and at all focal lengths for "nearly" all the images...... when there is a miss, it's more to do with a bird (and it's usually is a bird) that was flying past fast or erratically, anything stationary is fine.
.....There is only one general exception and that is when the object is black against a bright sky. I also zoom in to 100% on birds etc. probably a maniac habit.....yes there are a few misses here and there, but I've rechecked with similar shots to find they were just a few outliers.
The more I've read, be it forums or utube user reviews, the more I see frustrated photographers having trouble with Sigma lenses especially the Art range. It makes me wonder if that "is" why they introduced this USB dock...... don't get me wrong, I think it's a great idea, but it should resolve issues and many are finding that they spend endless hours "twiddling" with fine tuning whilst ending up still having mis-focuses......
Others find fewer problems, but there seems to be a large gamble in the final outcome and it is at best uncertain.
My findings from pure reading and watching is that Sigma's optics are first rate but their AF is not yet without too many errors. Frankly I dare not buy an Art lens in case I find myself in the same boat...... and it's a pity!
I'm surprised by the vast range of different AFMAs that are needed for your Sport, my Tamron gets along fine with just -2 at all distances and at all focal lengths for "nearly" all the images...... when there is a miss, it's more to do with a bird (and it's usually is a bird) that was flying past fast or erratically, anything stationary is fine.
.....There is only one general exception and that is when the object is black against a bright sky. I also zoom in to 100% on birds etc. probably a maniac habit.....yes there are a few misses here and there, but I've rechecked with similar shots to find they were just a few outliers.
The more I've read, be it forums or utube user reviews, the more I see frustrated photographers having trouble with Sigma lenses especially the Art range. It makes me wonder if that "is" why they introduced this USB dock...... don't get me wrong, I think it's a great idea, but it should resolve issues and many are finding that they spend endless hours "twiddling" with fine tuning whilst ending up still having mis-focuses......
Others find fewer problems, but there seems to be a large gamble in the final outcome and it is at best uncertain.
My findings from pure reading and watching is that Sigma's optics are first rate but their AF is not yet without too many errors. Frankly I dare not buy an Art lens in case I find myself in the same boat...... and it's a pity!