Leica DMIL - Filter, condenser, and lamp housing data

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Performance data of filters
Filter
Grey filter N/Neutral filter Grey filters (neutral filters) are used to attenuate
the light without influencing the colour tempera-
ture. The engraved value, e. g. N16, indicates the
attenuation. N16 indicates a reduction to 1/16 =
100/16 = 6.25 % transmission.
Green filter, GR panchromatic Contrast enhancement for b/w images.
DLF Conversion filter (daylight filter blue, similar to
CB12) for colour photography with daylight film,
integrated in filter magazine.
BG38 (Blue filter) Suppression of red in fluorescence applications
(integrated in fluorescence illuminator).
ALF Artificial light filter for colour photography with
artificial light film, to enhance colour contrast.
BG20 For red enhancement in Polaroid images.
VG9 (Green filter) Contrast enhancement for chromosome photo-
graphy.
CB1.5, CB3 Conversion filter blue: To increase the colour
temperature when using special lamps.
CR1.5 Conversion filter red: To reduce the colour
temperature, e. g. from 6000 K (colour tempera-
ture of a Xe lamp) to 5500 K (colour temperature
for daylight film).
BG23 Contrast enhancement of the complementary
colours blue and red on b/w film.
Application