Commodity200520062007200820102011
Objective lenses for cameras/projectors/photog. enlargers/reducers, of any ... $163 $18,450$3,701 
Objective lenses (excl. of 9002.11), of any mat., mounted   $769$1,262$494
Filters (i.e., optical elements), of any mat., mounted  $170 $1,357 
Lenses, prisms, mirrors & oth.optical elements, of any mat., mounted, being ...$2,710$8,559$1,160  $43
Total$2,710$8,722$1,330$19,219$6,320$537