Instruction manual

SETTING THE DIAPHRAGM

Setting the diaphragm of your Bolex Zoom Reflex

P 1

is as easy as it is accurate. ,

This is how you should go about it:

1. Note the sensitivity of the film you are using

If this is an ASA rating, there is no problem.

If it is a oDIN rating, convert it to an ASA rating by

using the following table:

11 \12113\14115116117118119120 21 1221231241251261271

10 12 16 20 25 32 40 50 64 80 100 125 160 200 250 320 400

2. Turn the exposure index dial until the film rating

(in ASA) is opposite the filming speed -

f.p.s.

- 18

f.p.s. (indicated by a wide index which is valid

also for

f.p.s.) -

f.p.s. (only indicated by means

of a stroke) -

f.p.s. -

f.p.s. (only indicated by

means of a stroke) or

f.p.s.

At the filming speeds 16 or 18 f.p.s. you can lock the

button by pushing the grooved slide (c) inwards.

Doing this you secure at the same time the correct

position of this button.

WHAT DO THE FOCAL LENGTHS

8, 13, 25

AND 40 CORRESPOND TO?

The focal length of a wide-angle lens - for long shots or when it

is difficult to stand back from the subject (buildings, interiors, etc.).

Gives heightened perspective.

The focal length of a standard lens - for ordinary shots. Gives nor-

mal perspective.

25 and 40 mm The focal lengths of telephoto lenses - for close-ups shots of more

or less distant subjects; also produces very effective extreme close-ups.

Gives flattened perspective.

8mm

13 mm

ZOOM EFFECTS

Zoom effects e.reso called to distinguish them from dollying shots made with the camera

on a moving platform (a carriage, car, train, etc.). Here the camera stays in the same

place and only the focal length is changed. This is the technique used by newsreel and

television cameramen when they' want a detailed or extensive shot or have to follow a

moving subject (sports scenes, for example) without altering the position of the camera.