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Leica M7の取扱説明書・マニュアル [全134ページ 1.37MB]

94The rangefinderThanks to its high effective base width, the rangefinder of the three LEICA M7 models permitvery precise control. This is particularly advan-tageous when wide-angle lenses, which provide arelatively large depth of field, are used. The largermagnification of the 0.85x viewfinder with its longer base width leads to even higher accuracy:Mechanical base width x Viewfinder = Effective(distance between magnification base widththe optical axes of the viewfinder and the rangefinderwindow)LEICA M6 TTLwith 0.72x approx.viewfinder 69.25mm x 0.72 = 49.9mmLEICA M6 TTLwith 0.85x approx.viewfinder 69.25mm x 0.85 = 58.9mmLEICA M6 TTLwith 0.58x approx.viewfinder 69.25mm x 0.58 = 40.2mmThe rangefinder field is the bright rectangle in thecenter of the viewfinder field. If you cover up thelarge viewfinder window (16), only the bright-lineframes and the rangefinder field remain visible.The bright, sharply defined rangefinder field per-mits the use of either coincidence or split-imagerangefinder focusing.Coincidence (double image) focusingFor a portrait, for example, align the eye with therangefinder field and turn the focusing ring of thelens until the contours in the rangefinder fieldmerge. You can now determine the subject com-position.Split-image focusingFor photographs of architecture or other subjectswith straight vertical lines, align those vertical lines with the rangefinder field and turn the focus-ing ring of the lens until the contours form a con-tinuous line at the limits of the rangefinder field.You can now determine the subject composition. In practice, there is rarely a clear distinction between the two methods. It can be very effectiveto use a combination of the two.

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