Just picked up the infamous Tammy 17-50 2.8 and pretty disappointed. Wondering if I can get some feedback from existing owners.
I'm seeing a few issues with the copy of the lens I have:
1. It's missing focus a bit and I needed to dial in an AF adjustment to make it better. At one point I used the dot focus method after MF and a range of +5 to -7 all locked (is such a wide range normal?) so I used a subjective method to pick the best point instead.
2. Focusing using CDAF through live view is even more inaccurate than PDAF through the viewfinder.
3. The camera refocuses slightly between F2.8-4.5 and F5.6+. With the adjustment I have dialed in right now it misses focus at F5.6.
4. Seems softer than expected at F2.8...
I have attached two images. The 3 image set is the same lens with a Sony mount from a review - it's the type of performance I was expecting. The 4 image set is my copy.
Oh, and my lens is stamped "Made in China" if that makes any difference.
I guess the question is, do I return it? Try to get another copy? send it in Tamron for service? or am I being too picky?
Thanks,
Rob