Tamron Zoom Shootout (28-75, 28-200, 35-150 EF, and 70-180)
180mm
28-200 left, 70-180 right
lack of lens stabilization is almost certainly a factor now, but something weird is going on. They both look pretty crappy here, with the 28-200 pretty bad at center and the 70-180 really bad at center. However something really weird is happening. The 70-180 is excellent in the UL and the 28-200 is pretty awful here. The 28-200 is pretty decent in the UR and the 70-180 is pretty awful here. Can IBIS without lens stabilization render only one small portion/side of the frame in focus and everything else blurry? if there were NO sharp parts of the fame I would label both as clear camera shake/motion blur from lack of image stabilization. This is largely the case but each lens also has ONE small portion that is sharp...
I don't know what's going on, but I don't like it. I am pretty confident there isn't some gross decentering of either lens, as nothing like this showed up in my tripod tests. Globally the images look kinda ok, but the lack of OSS and this longer focal length are definitely not looking great here. Maybe if I shot 5-10 shots I'd find a great one or two, but I only shot one shot each as that's how I realistically shoot landscapes.
