Leica R6.2 User Manual download pdf (Page 41)

Filters and their use

In TTL systems, the exposure meter auto-

matically takes into account the reduced

amount of light absorbed by the filter in use

and that still passes through the lens, but

sensitivity in various parts of the spectrum

may vary according to the type of film

emulsion used. Extreme and very dense

filters may therefore cause deviant readings.

For example, an orange filter as a rule needs

about one extra stop and a red filter an

average of about two stops more than the

exposure-meter reading obtained. How-

ever, the red sensitivity of black-and-white

film can vary widely, and no generally

applicable values can be given.

In the case of the circular polarization filters

we supply for LEICA lenses, determine the

exposure as you would do with any other

filter, in either integral or selective mode.

The highly effective multiple coating on the

semi-transparent swing mirror of the

LEICA R6.2 acts as a powerful polarizing

surface. As a result, the use of linear polari-

zation filters is not advisable, because their

positioning to inhibit and transmit light may

seriously affect the accuracy of the exposure

meter.

Not For Resale – Free Download at http://homepage.ntlworld.com/joechan/manuals

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 53 54

No comments

Leica R6.2 User Manual Page 41