Been using a glimmerglass 1 filter on the 23mm F1.4 over the last week. Can't decide if I like it or not. Been using a glimmerglass 1 filter on the 23mm F1.4 over the last week. Can't decide if I like it or not. Been using a glimmerglass 1 filter on the 23mm F1.4 over the last week. Can't decide if I like it or not. Been using a glimmerglass 1 filter on the 23mm F1.4 over the last week. Can't decide if I like it or not. Been using a glimmerglass 1 filter on the 23mm F1.4 over the last week. Can't decide if I like it or not. Been using a glimmerglass 1 filter on the 23mm F1.4 over the last week. Can't decide if I like it or not.