So I am testing a new Tamron lens and while testing I noticed that at 15mm the edges wouldnt get sharp even at F8 unlike tested on some reviews. I sent Tamron some photos and they acknowledged the issue and told me they just need to adjust/align it. Heck, the guy even told me I could send my camera to get it perfectly matched to it. Not like I am sending my A7Rii on that trip but still interesting service. Anyways, I feel it makes more sense to me to send it to Tamron and get a hopefully "perfect" lens vs sending back to B&H and hope for a better copy. What do you guys think?