B&L Iris - Antique and Vintage Cameras

Iris

1890

Improved Model

Bausch & Lomb Optical Co.

Rochester

USA

Image of Iris

Shutter Type:
Combined iris and diaphragm shutter. 8 blades. Spring powered, pneumatic exposure control.

Attributes:
Speeds 1/100 - 3s, T. Iris: f8 - f64. Mounted between the lens. Finger and pneumatic release.

Serial Number:
4916 .

With:
f8 lens.

This is an early diaphragm shutter, the blades open to a varying degree and so act as the iris.

Coe lists three variants: Model of 1888 with horizontal delay cylinder; Model of 1889 with delay and release cylinders set at an angle on the face of the shutter; Model of 1890 with vertical cylinders and self-capping operation.

The shutter is found on many American cameras of the period. Several sizes were made: " throat for 5" x 4"; 1 ⅛" for half-plate; 1 7/16" for whole plate; 1 " for 10" x 8". The case was made of aluminium or brass.

References & Notes:
BP 12442/1890 (BP 7176/1888 is also of interest). BJA 1900, p. 68. N&G Cat. 1908, p. 90. Coe, Cameras.

Goerz Sector

Improved Model

1902

C.P. Goerz

Berlin

Germany

Image of Goerz Sector

Shutter Type:
Combined iris and diaphragm shutter. Pneumatic delay.

Attributes:
Speeds 1/150 - 1/2, f6 - f45.

Serial Number:
1671 .

This is a combined shutter and iris. The earlier version had the speed setting at 6 o'clock and the aperture setting at 7 o'clock. The improved model of 1902 had the speed dial at 2 o'clock.

References & Notes:
BP 17844/1894 (The shutter described here is not a combined shutter/iris type). BJA 1898, p. 66. BJA 1899, p. 70. BJA 1902, p. 63. BJA 1903, p. 67.

Volute

1902

Bausch & Lomb Optical Co.

Rochester

USA

Image of Volute

Shutter Type:
Combined iris and diaphragm shutter. Spring powered, pneumatic control.

Attributes:
Speeds 1/100 - 3s, f6.8 - f45.

Serial Number:
846069 .

With:
f6.8, 180 mm Goerz Doppel Anastigmat Series III. Serial no. 191214.

References & Notes:
BJA 1905, p. 911. N&G Cat. 1908, p. 86.

Pocket Automatic

1903

Eastman Kodak Co.

Rochester

USA

Shutter Type:
Combined diaphragm shutter and iris. Five blades, spring powered. Finger and pneumatic release.

Attributes:
Speeds I, B, T. Iris settings 1 - 4.

Notes:
From a Stereo Brownie No. 2.

Combined shutter and iris diaphragm units were usually aimed at the upper end of the market. This model though was in the cheaper range. Only one linkage rod is required between the two sets of leaves.

References & Notes:
Kodak Cat. 1915, p. 34.


Company Details:

Kodak

Guerry Flap Shutter

Phoenix

Lancaster Rotary

Unnamed Studio Shutter

Idento Sector

N&G Sector

Lancaster See-Saw

Sands' Patent

Simplex

Nydia

Newman's Patent

The Adjustable

Single blade Return

Linhof

Le Perpetuel

Derval, Vario, Nettar

Victor, Unicum, Argos
Automat, I T B

Regular, Junior
Trichro, Eastman Triple Action

Compound

Compur

Koilos

Ibso, Vario

Automat, Ilex
Ball Bearing, Kodamatic

Luc, Agilux
T-P Gun Camera

B&L Iris, Goerz Sector, Volute
Pocket Automatic

T-P T&I

T-P Time, Studio, Snap-Shot

T-P Stereo

N&G Roller-Blind

Kershaw Patent

Roller-Blind

T-P Focal-Plane

N&G Focal-Plane

Minex

Eye-lid