33 Cloce-up Flash. 34 Flash Photography with an Electronic Flash Unit. 35 Flash Bulb Photography. 36 Motor Drive Photography. 37 Winder 2 Operation. 40 Care and Storage. 42 Questions and Answers. 44 The Most Important Feature of the OM-1 -- TTL Direct (off-the-film) Light Zuiko Interchangeable Lens Group. 51 Table of Interchangeable Lenses. 53 Interchangeable Lens Group Units. 55 Finder Group. 57 Finder Group Units. 58 Flashphoto Group. 61 Flashphoto Group Units. 64 Motor Drive Group. 71 Motor Drive Group Units. 74 Macrophotography Group. 76 Macrophotography Group Units. 78 Phototechnical Group. 84 Measuring. 47 Phototechnical Group Units. 88 Photomicrography Group. 89 Photomicrography Group Units. 92 Chart of Photographic Ranges. 94 Case Group and Units. 95 6 MOUNTING THE LENS INSERTING THE BATTERIES Mount the Lens. Align the red dots on the lens flange and the body mount ring. Turn the lens clockwise until the lens release button springs up and you will hear positive "click". Insert two 1. 5V silver oxide batteries SR44 (Eveready EPX-76 or equivalents) into the battery chamber. CAUTION: Batteries should be always replaced as a pair. If battery polarity is incorrect, the camera does not function. Lens Removal To detach the lens, press down on the lens release button and turn the lens counter-clockwise...