Extra 7% off on select YSDIGI photo filters

Amazon is having an extra 7% off discount on select YSDIGI photo filters. You simply click on the little box next to the coupon to add it to your Amazon account ~ so you must needs be logged on to an Amazon account when you do this, as it has no other way of linking the coupon to your account. Not all of the filter size have the coupon, but of the ones I checked, the coupon works on the 82mm, 77mm, 67mm, 62mm, and 58mm.