Sony SLT-A37 Instruction Manual - Page 84

Specifications Name (Model name) Minimum focus** (m (feet)) Maximum magnification (X) Minimum f-stop Filter diameter (mm) Dimensions (maximum diameter × height) (approx., mm (in.)) Mass (approx., g (oz.)) DT 18-55mm F3.5-5.6 SAM (SAL1855) 0.25 (0.82) 0.34 f/22-36 55 69.5×69 (2 3/4 × 2 3/4) 210 (7 4/8) DT 55-200mm F4-5.6 SAM (SAL55200-2) 0.95 (3.2) 0.29 f/32-45 55 71.5×85 (2 7/8 × 3 3/8) 305 (10 3/4) DT 18-135mm F3.5-5.6 SAM (SAL18135) 0.45 (1.48) 0.25 f/22-36 62 76×86 (3 × 3 1/2) 398 (14) * The values for equivalent 35mm-format focal length and angle of view are based on Interchangeable Lens Digital Camera equipped with an APS-C sized image sensor. ** Minimum focus is the shortest distance from the image sensor to the subject. • This lens is equipped with a distance encoder. The distance encoder allows more accurate measurement (ADI) by using a flash for ADI. • Depending on the lens mechanism, the focal length may change with any change of the shooting distance. The focal length assumes the lens is focused at infinity. • The infinity position provides for some adjustment to compensate for focus shift caused by change in temperature. To shoot a subject at infinite distance in MF mode, use the viewfinder and set focus. On focal length The picture angle of this camera is narrower than that of a 35 mm-format camera. You can find the approximate equivalent of the focal length of a 35 mmformat camera, and shoot with the same picture angle, by increasing the focal length of your lens by half. For example, by using a 50 mm lens, you can get the approximate equivalent of a 75 mm lens of a 35 mm-format camera. 84