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Art Deco Cameras

Coronet Diadem Box No.2


Coronet Diadem Box No.2<
Coronet Diadem Box No.2<
Manufacturer: Coronet
Produced: 1935
Classification:Medium Format
Body Type:Box
Film Type:120
Film Width:62mm
Image Size:2¼ x 3¼ in
No. of Images:8
Lens Type:Meniscus
Focus Type:Fixed
Focal Length:105mm
Focus Range:8ft to inf.
Aperture Type :Fixed
Aperture :f/15
Shutter Type:Rotary
Shutter Speeds:I*(1/50 sec),B
Size (w x h x d):90 x 105 x 125 mm
* Measured on this camera

Art Deco Credentials

Limited: Minor and insubstantial


This Diadem Box No. 2 camera was made by Coronet. The front of this camera has black and chrome circular design. The rest of the camera is simply covered in leatherette cloth. It is basically a cardboard box with the shutter mechanism mounted on a block of wood in the centre of the camera. It has two very small waist level viewfinders, one for portrait and one for landscape images. It has a genuine leather handle. There are no tripod sockets.

It has a simple meniscus lens with an aperture of f/15. The shutter is a toggle type. Press down for first photo and pull up for next. A pull out tab on the top allows you to select 'bulb' operation. The speed of the shutter on this camera was measured as 1/50 sec. It has a Chromed S-shaped winder to wind on the film. A red window is provided on the rear of the camera to view the frame numbers. It does not have a red widow cover. It takes 8 photos on 120 film.

How to Use

This camera takes 120 film which is easily available.

As the shutter speed is only 1/50s, it is advisable to use a tripod with a flat top to get clear shake free images. However, holding it against a wall or other solid object would work as well. For quick snapshots, hold it firmly against your body.

If you don't want to bother with an exposure meter, follow the guide shown. 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.

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

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

Using ISO 100/125 film - shutter speed 1/50s

Weather ConditionsShadow DetailApertureExposure
with sharp edges
f/15+2 Stops
SunnyDistinctf/15+1 Stop
Slight OvercastSoft around edgesf/15Good
OvercastBarely visiblef/15-1 Stop
Heavy OvercastNonef/15-2 Stops
Not Acceptable
Open Shade
Nonef/15-3 Stops
Not Acceptable