☰ Menu
Art Deco Cameras

Kodak Duo Six-20 Series II

Specification


Kodak Duo Six-20 Series II
Kodak Duo Six-20 Series II
Manufacturer: Kodak
Produced: UK 1937 - 1939
Type:Folding
Film Size:620
ImageSize:2¼ x 1⅝ in
Lens Type:Kodak Anastigmat
Focal Length:75mm
Focus Type:Variable
Focal Range:3.5ft - inf.
Aperture Type:Iris
Aperture:f/3.5 - f/22
Shutter Type :Compur-Rapid
Shutter Speeds:T,B, I(1/500 - 1 sec)
Size Closed (w x h x d):130 x 92 x 36 mm
Size Open (w x h x d):130 x 113 x 100 mm

Art Deco Credentials

star star star star
Significant: Pronounced and self evident

Description

Duo-620 Strut Detail
Strut Detail

The Duo Six-20 is a self erecting folding rollfilm camera that takes 16, 2¼ x 1⅝ inch exposures on 620 rollfilm. It has a f/3.5, 75 mm Kodak Anastigmat lens. The iris diaphragm gives a range of f/3.5 to f/22. It has a variable focus and will focus down to 3.5 feet by the use of a helical focussing mount. It has a rim-set Compur shutter with speeds 1 - 1/500s, B, T. It has a body mounted shutter release but it is uncoupled to the film advance, so double exposure is possible. It has two red windows which are used to get 16 exposures from 620 film. The film is advanced until a number appears in the first window and an image is taken. Then the film is advanced until the same number appears in the second window. Then it's back to the first window for the next number.

The metal body is covered in leather and it has leather bellows. It has a direct optical finder on the body. There is a chrome baseboard release bar at the front under the lens. An accessory shoe is provided. On the top of the camera is a depth of field calculator.

Dof Calculator
DOF Calc.

There are three versions of this camera. The one shown was the second model.

The first version of this camera appeared in 1933. It had a lined enamelled top plate rather than chrome and a key to wind on rather than a knob. It had un-adorned struts and there was no baseboard release bar and no accessory shoe. It had a f/4.5 lens which was focussed by the front cell. Get more info about Series I here:- Kodak Duo Series I

From Sept 1939, the third version arrived which was fitted with a combined viewfinder/rangefinder, with the shutter and wind-on interlocked. There is no depth of field calculator.

Several lens and shutter combinations were available. These were:-

How to Use

This camera takes 620 film which is still available from selected photographic outlets. Although the actual film is the same as 120 film, the spools are different. The 620 spools are slightly shorter and have a smaller diameter. Do not use 120 film in this camera because it will jam and may snap. It is possible to cut down a spool of 120 film to fit or to re-spool some 120 film onto 620 spools in a darkroom or changing bag.

If you don't want to bother with an exposure meter, follow the guide shown, using shutter speeds of 1/25s, 1/50s and 1/100s only. It is based on the 'Sunny 16' rule. Film is so forgiving and will produce acceptable results even when overexposed by 2 or 3 stops or underexposed by 1 stop.

Remember that the exposure guide in the camera user manual may not be helpful as it is based on the use of old film with a low ISO value.

The tables assume that the sun is at least 30 degrees above the horizon - that's 10am - 5pm on a summer's day (May-August) in the UK.

If you are not sure about the light level, err on the side of overexposure - i.e. assume the smaller f number.

Where there is a choice, a larger f number will give a larger depth of field.

For the slower speeds, you may need a tripod to stop blur through shake.

Using ISO 100/125 film

Weather ConditionsShadow DetailShutter Speed (s)
1/251/501/100
Sunny
Snow/Sand
Dark
with sharp edges
--f/22
SunnyDistinctf/32f/22f/16
Slight OvercastSoft around edgesf/22f/16f/11
OvercastBarely visiblef/16f/11f/8
Heavy OvercastNonef/11f/8f/5.6
Open Shade
/Sunset
Nonef/8f/5.6f/4