User manual

FOCUSING DISTANCE CALCULATION

There are two distance scales (in feet and metres) visible

through the window on the upper part of the lens barrel.

The focusing distance is read off the chosen scale from the

central lens index (A).

STOP DOWN / DEPTH-OF-FIELD PREVIEW

A visual depth-of-eld preview can be made by pressing the

STOP DOWN button (B) while viewing the image in the viewnder.

Depth-of-eld is calculated as follows:

1 Focus the lens as required.

2 Make an exposure reading (auto or manual) and note the

aperture setting.

3 Find the markings on either side of the central index that

correspond to the chosen aperture.

4 From these two markings, read off on the required lens

distance scale the two corresponding distances.

5 The depth-of-eld (at that particular aperture and focus

setting) is the area included between these two distances.

In the example to the right, the focusing distance is set at

nearly 3m (three metres). At an aperture of f/22, the depth-of-

eld would therefore extend from just over 2m to approximately

4.5m.

Note!

The depth-of-eld is not absolute. Perception of it depends on

several factors and so it should be seen only as a rough guide.

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