11-10-2012, 11:04 AM
Hi Tom,
The slight decentering that you show in your images will quite likely
go away if you stop down to f/8 or f/11. I've seen images of the 15-85
showing much worse decentering (but typically more on the 15mm end.
So, if yours is ok at the 15mm end, especially, if the vignetting
shown in the corners of a wide open 15mm image is evenly
distributed, I would certainly keep the sample you have.
Just my thoughts .... Rainer
The slight decentering that you show in your images will quite likely
go away if you stop down to f/8 or f/11. I've seen images of the 15-85
showing much worse decentering (but typically more on the 15mm end.
So, if yours is ok at the 15mm end, especially, if the vignetting
shown in the corners of a wide open 15mm image is evenly
distributed, I would certainly keep the sample you have.
Just my thoughts .... Rainer