Olympus OER Pro .2 Micron Internal Filter - Supply4GI
OLYMPUS IX-RFAC FLUORESCENCE FILTER TURRET FOR IX50/IX70 MICROSCOPE | eBay
Amazon.com : 62mm Macro Close-Up Filter Set (+2 +4 +8 +10) Macro Filter Accessory with Lens Filter Pouch for Fujifilm XF 23mm f/1.4 R Lens/Olympus Digital ED 12-40mm f/2.8 PRO Lens and