Pentax MV MV Manual - Page 25
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in daylight or in brightly lit arenas and stadiums if you use a wide maximum aperture. (This technique does not work in low-lighting, as low lighting necessitates a slow shutter speed.) Depth of Field Control: Depending upon the aperture in use, different areas in front of and behind your subject will be in focus. This is known as depth of field and its effect can be varied by changing lens apertures. If you need to know the critical depth of fields refer to the depth of field scale and tables on pages 26 and 27. Often, however, you can get by if you remember the following. Maximum Depth of Field: The depth of field becomes progressively deeper as the lens is stop down to smaller apertures and is greatest at minimum aperture. Thus, if you desire both your,subject and background to be in focus, use a small aperture such as f/11 and f/16 the yellow LED Lights, take precautions against camera shake). Small apertures are also useful for critical close-up work, but for this, refer to a close-up photography guide. Out-of-focus highlights: The depth of field becomes progressively shallower at wide lens apertures, and is shallowest at f/2, f/1.7 or f/1.4, depending upon which is the maximum aperture of your ♦ lens. A shallow depth of field produces an out-of-focus effect which highlights your subject. Provided the green LED remains lit, you can obtain this effect by using a wide maximum aperture, even on a sunshiny day. •23