Pentax DS Operation Manual - Page 14

12 J Camera Characteristics Before Using Your Camera • Features a 23.5×15.7 mm CCD with 6.1 million effective pixels for high precision and a wide dynamic range. 1 • Features an AF sensor with 11 focusing points. The central 9 are wide cross area sensors. • Improved manual focusing using a viewfinder similar to a conventional 35 mm SLR camera, with 0.95× magnification. Also features a superimpose function in which the focus points on the viewfinder illuminate red. • Use CR-V3, AA lithium batteries, rechargeable AA Ni-MH batteries or AA alkaline batteries. • Concepts of Universal Design have been implemented to various parts of the camera. The high resolution LCD monitor features large characters, and buttons are easier to use. The captured area (view angle) will differ for J and 35 mm SLR cameras even if the same lens is used because the format size for 35 mm film and CCD are different. Sizes for 35 mm film and CCD 35 mm film : 36×24 mm J CCD : 23.5×15.7 mm Angles of view being equal, the focal length of a lens used with a 35 mm camera must be approximately 1.5 times longer than that of J. To obtain a focal length framing the same area, divide the focal length of the 35 mm lens by 1.5. Example) To capture the same image as a 150 mm lens attached to a 35 mm camera 150÷1.5=100 Use a 100 mm lens with the J. Inversely, multiply the focus distance of the lens used with J by 1.5 to determine the focus distance for 35 mm cameras. Example) If 300 mm lens is used with J 300×1.5=450 Focus distance is equivalent to 450 mm lens on a 35 mm camera.