An Olympus microscope BH2"35 WHK 10x/ 20 L" Photo Finder eyepiece with built-in masks for 35mm/ full frame digital Photography– Has frame masks showing field of view when using photo-eypieces NFK 2.5x. 3.3x, 5x and 6.7x. Has built-in retractable lens hood. Focus mechanism smooth. Excellent condition- free from scratches. Fungus, fogging.