User's Manual

Not For Resale – Free Download at http://www.joe-chan.com/manuals

The working range of the LEICA M6 TTL

shutter is indicated schematically by the hat-

ched vertical column at the far left-hand side of

the drawing, "B" representing the unrestricted

upper end.

The aperture values (Av) are shown on the

lower left-hand side.

Example A shows the correlation between the

film speed, luminance (brightness), exposure

and aperture.

First follow the vertical line from the film speed

(ISO 100/21°) down to the intersection on the

horizontal line representing the corresponding

luminance. In example A, this is 4000 cd/m

i.e. a typical value for bright sunlight. The line

now runs diagonally to the vertical line

indicating the aperture (11), and from there

horizontally to the required exposure (1/250 s).

In the course of this diagonal, the exposure

value (15) can also be read off.

Example B shows that in candlelight and with

a film speed of ISO 400/27° (1 cd/m

photographs should be taken with an apertu-

re of f/1.4 and a shutter speed of 1/15s. An

aperture of f/11, for example, can no longer be

used as the corresponding shutter speed of 4

s is not available on the shutter speed dial. As

the slowest shutter speed available on the dial

is only 1 s, exact metering is also no longer

possible. The correct shutter speed can

therefore be obtained only by conversion or

from this diagram.