General Information

Serial #

N/A

Part Number

1

Total Parts

5

AKA

N/A

Patents

N/A

General Description

METAL RINGS; GLASS FILTERS

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

N/A

Width

4.7 cm

Height

N/A

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Photography

Category

Still camera accessories

Sub-Category

N/A

Manufacturer

AKA

ROLLEI

Country

Federal Republic of Germany

State/Province

Unknown

City

Brunswick

Context

Country

Worldwide

State/Province

Unknown

Period

PROBABLY USED IN THE 1960'S

Canada

PART OF A COLLECTION OF PHOTOGRAPHIC EQUIPMENT FROM THE ESTATE OF WILFRED HAROLD OLSON, FOUNDER AND PRESIDENT OF DOMINION WIDE PHOTOGRAPHY LTD., OTTAWA (C 1950-1955). MR. OLSON WAS A PHOTOGRAPHER FOR MANY YEARS AND HIS STUDIO DID WORK FOR BOTH THE OTTAWA JOURNAL AND THE CBC.

Function

USED WHEN ATTACHED TO A CAMERA LENS TO ADJUST THE COLOUR CONTRAST IN BLACK AND WHITE FILMS BY REDUCING CERTAIN COLOOURS AND ACCENTUATING OTHERS BY FILTERING OUT DIFFERENT LIGHT RAYS.

Technical

YELLOW FILTERS REDUCE BACKGROUND BLUE AND ACCENTUATE OTHER COLOURS. GREEN FILTERSREDUCE BLUE AND RED -DIFFERENTIATES BETWEEN DELICATE HUES OF GRASS & FOLIAGE. RED FILTERS ALMOST COMPLETELY SUPPRESS BLUE & GREEN AS WELL AS UV RAYS. THE BLUE FILTER SUPPRESSES WARM OR REDDISH TINGES. [REF 2]

Area Notes

Unknown

Details

Markings

ALL HAVE PRINTING ON RING WHICH READS: 'FRANKE & HEIDECKE GERMANY 38 [SYMBOL FOR PHI]'/ INDIVIDUAL MARKINGS:.1 'Rollei - gelb - hell'/.2 'rollei - gelb - mittel'/.3 'Rollei - hellgrun'/.4 'Rollei - heilblau'/.5 'Rollei - hellrot'

Missing

COMPLETE

Finish

ALL HAVE POLISHED SILVER RINGS WITH BLACK PRINTING/.1 &.2 YELLOW FILTERS;.3 GREEN FILTER;.4 BLUE FILTER;.5 RED FILTER

Decoration

N/A