Nikon FA Instruction Manual

Also see for FA: Instruction manual

Contents

Nikon FA Instruction Manual Manual pdf 45 page image

46TECHNICAL INFORMATION/PHOTOGRAPHY TECHNIQUES continuedRELATIONSHIP BETWEEN SHUTTER SPEED AND APERTUREShutter Speed (sec.) 1/4000 1/2000 1/1000 1/500 1/250 1/125 1/60 1/30Aperture (f-number) 1.4 2 2.8 4 5.6 8 11 16The amount of light reaching the film plane is determined by acomb nation of shutter speed and lens aperture. A shutter speedof 1/125sec. Iets in twice as much light as a setting of 1/250secand only half as much light as 1/60sec An aperture setting off/11 lets in twice as much light as f/16, half as much as f/8 Thus,if the correct exposure for a particular picture-taking situation is1/500 at f/4, then 1/250 at f/5.6 or 1/125 at f/8 will give the sameexposure.The table above is one example showing the interrelationshipbetween shutter speed and aperture. Each combinationproduces correct exposure but the effects of the pictures arequite different. The best combination will depend on the resultsyou want. Fast shutter speeds freeze motion while slow speedsproduce a deliberate blur. Also, small apertures give greaterdepth of field, while large apertures restrict the zone of sharpfocus to the main subject. (Refer to page 48 for details on depthof field.)A good rule to follow in preventing camera shake is to select ashutter speed which is never slower than the reciprocal of thefocal length of the lens in use For example, when using a norma50mm lens, select a speed no slower than 1/60sec (the closestnumber to 1/50). For a 200 mm super-telephoto, use no lessthan 1/250 sec., and so forth.If a slow shutter speed is necessary or the camera selects onein the automatic exposure modes, attach the camera to a tripodAs an alternative, use an electronic f ash or change to faster film