Home / HOME & LEISURE / Photo & Video / Accessories Product Description Optex quality 27mm-37mm 27-37 Stepping Ring Filter Ring Adapter Step Up Canon to Zeiss Allows the use of 37mm filters or attachments on a lens with 27mm filter thread size. Super quality in black metal. Shop Soiled Box hence clearance price (see pictures). GAVSHOP LOC: STU001 GAVSHOP CODE: OPT37-27 Specifications Product Code OPT37-27 Delivery & Returns 27mm-37mm 27-37 Stepping Ring Filter Ring Adapter Step Up Canon to Zeiss Item in Stock Product Code OPT37-27 Allows the use of 37mm filters or attachments on a lens with 27mm filter thread size. £4.95