And broke my 50 mm 1.8 
The camera had a 17-70 Sigma on it when fell... and it broke the filter that was on it. The impact was pretty hard, on the corner of the lens/fitler.
Visually, the 17-70 seems OK. Could it have been knocked out of alignment at all? What is the best way to test? Can it be fixed if there is a problem? 


TIA
As for your Tamron, it'll be best to do some tests, real life and focus test, then decide if it needs to be repaired.
I'll try the tests suggested... but for now I have attached a pic of the broken 50mm (using the Sigma). I included a 100% crop... I think it still looks pretty sharp???
Bag was unzipped, and I picked it up... fumbled it (as I didn't know it was unzipped), and the 50mm went flying. I tried to catch the 50mm, missed it, and managed to spill the camera (with 17-70 attached) and then bag... to the ground


