User Guide

The 50mm Dual

The 50mm DualThe 50mm Dual

The 50mm Dual

Range SUMMICRON

Range SUMMICRONRange SUMMICRON

Range SUMMICRON

This version of the 50mm SUMMICRON lens has two focusing ranges; 1. The normal

range from infinity to 3

feet (1 meter); 2. The close-up range from about 35 to 19 inches

(88 to 48 cm) from the film-plane.

An optical finder attachment fits onto the top of the lens mount for use within the near

range. This adapts the coupled range-viewfinder for close-up focusing. The lens thus acts

at the same time as a close-up focusing mount with parallax compensation. The lens is

inserted into the LEICA M3

— without finder attachment —

in the usual way, by aligning

the red dots on mount and body opposite each other, and turning clock-wise to lock.

Focusing between infinity and 31/2, feet (1 meter).

Over this range the lens is used like

any other LEICA lens. At 31/2 feet (1 meter) the focusing movement is limited by a stop.

Focusing between 35 and 19 inches (88 and 48 cm).

The distances are measured from

the back of the camera to the subject. Set the focusing mount of the lens to its near limit of

3/2 feet (1 meter), as shown in Fig. 1, pull outwards, and move it across the stop into the

35 inch (88 cm) position (Fig. 2). The lens remains locked in this position until the optical

finder attachment is fully pushed home in its special fitting, thus releasing the focusing

movement for the close-up range (Fig. 3).

Fig. 1 Fig. 2 Fig. 3

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