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Olympus Zuiko Digital ED 300mm f/4 IS PRO

Tips for Getting Sharp Images

Various tips involving sharpness.

Focusing and depth of field

To make a point of how thin depth of field is, according to EXIF info, the hyperfocal distance for the Olympus 300/4 at 1500m at f/4, 1071m at f/5.6 and 750m at f/8 (according to EXIF info). In practical terms this is fairly meaningless; at a kilometer away the atmospheric effects exert a strong influence on image quality.

Accordingly, focus exactly on the desired target, or forget about achieving sharpness. To this end, most examples in this review were focus manually, to ensure that exactly the desired element(s) were in peak focus. Particularly for flowers and similar this becomes very important as the AF system cannot know which portion of the subject to focus on.

Tips for shooting on a tripod

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Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

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