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 (Daylight filter, 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

Artificial light filter 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.

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Image 118
Leica DM IRB Filter performance data Use Grey/neutral density filter N, Green filter, GR, panchromatic, BG20, CB1.5, CB3