Originally Posted by Buddha Jones
Please help out, if you have a DA* 16-50mm please post your SN# here and wether it is a good or a bad copy and if it's a bad copy where you got it from. This will help to keep count of bad vs. good and perhaps build a corrolation with the serial numbers as well.
Any chance someone can post test procedure as well? Common test procedure will only make these results more consistent.