Leica DM IRB, Инструкция по эксплуатации

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Filter performance data
Filter Use
Grey/neutral density filter N Grey (neutral density) filters are used for light
attenuation without influencing the colour
temperature. The engraved value, e. g. N16,
indicates the attenuation value. So N16 means a
reduction to 1/16 = 100/16 = 6.25 % transmission.
Green filter, GR, panchromatic For general contrast enhancement and black-
and-white photography.
DLF Conversion filter ( D ay l ight f ilter, blue, similar to
CB12), for colour photography with daylight film,
integrated in filter magazine.
BG38 (blue filter) Suppresses red for fluorescence (integrated in
fluorescence illuminator).
ALF A rtificial l ight f ilter for enhancement of colour
contrast in colour photography with artificial
light films.
BG20 For highlighting red in Polaroid colour photo-
graphy.
VG9 (green filter) Enhances contrast in chromosome photography.
CB1.5, CB3 Conversion filter, blue: raises colour tempera-
ture with special lamps.
CR1.5 Conversion filter, red: lowers colour tempera-
ture, e. g. from 6000 K (colour temperature of an
Xe lamp) to 5500 K (colour temperature of
daylight film).
BG23 Enhances contrast of the complementary col-
ours blue and red for black-and-white film.