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Minox B →
Subminiature espionage camera
The Minox-A is a small high-quality
subminiature camera that is small
enough to be hidden the palm of a hand.
It was built by Minox in Germany between 1948 and 1969.
It has the same size as the earlier Minox Riga and is
therefore the smallest subminiature camera ever made by Minox.
The camera is also known by its numerical denominator: II or III
(I was the original Minox Riga).
The body of the camera is made of aluminium. When closed,
it measures only 82 x 27 x 15 mm,
allowing it to be consealed in the palm of a hand very easily.
The image on the right shows a typical Minox A III.
The camera is operated by pulling it outwards from both ends.
When closed (i.e. fully pushed-in), the film advances to the next exposure,
even when no picture was taken.
This 'feature' was also present in the successor of this camera,
the Minox B,
but was solved in the later Minox C.
The Minox A II was produced from 1948 to 1950.
It was followed by the A III that was in production from 1951 to 1954.
In 1954 it was followed by a special variant for the US market,
the IIIS, which had a flash-synchronisation connector.
The latter was produced until 1969.
Unlike later models, the Minox A doesn't have a built-in light meter,
making it rather difficult to estimate the correct shutter speed.
To obtain good quality pictures, the user needed
an external exposure meter,
or a lot of experience.
The presence of an exposure meter in later models did come at a price
though; the Minox B was 15 mm longer and the Minox C nearly 4 cm!
Check the rightmost images below to compare the A, B and C models.
The camera shown here is a model III. It has serial number 55055 and was built in 1953.
Please note that, at the right hand side, it doesn't have the flash connector that is
present on the later IIIS model,
the Minox B
and the Minox C.
The Minox A has a mechanical shutter which ranges from 1/2
to 1/1000 sec. It also allows the shutter to be kept open manually (B).
The high-precision COMPLAN lens allows focussing from 20 cm (8 inches)
to infinity. When turning the focusing dial, the viewfinder moves in tandem
to correct for parallax errors.
Above the viewfinder is the so-called filter bar, that allows a red
or a green filter to be moved in front of the lens.
These filters are generally used to increase contrast.
When photographing documents, the measuring chain comes in handy.
It is 60 cm long and has small markers (bullets) at 20, 24, 30 and 40 cm,
just like the markings on the focusing dial.
When using the full length of the chain (i.e. 60 cm) the distance
is ideal for photographing A4+ size documents.
Each time a picture is taken, the frame counter increases, up to the maximum
of 50 exposures.
Closing the camera, also protects the lens by moving a plate in front of it.
Please note that each time the camera is closed,
the film is advanced to the next position,
regardless whether a picture was taken or not.
This was solved in the Minox C and later models.
Opening the camera in order to replace the film cartridge is simple.
First extend the camera in the usual manner, as if you want to take pictures.
Then turn the camera around
so that the bottom is up (1).
Next, extend the camera a somewhat further until a
recessed rig becomes visible
Use the nail of your thumb to
press down the recessed rig
This should unlock the camera.
Whilst pressing down the rig, slide away the body of the camera to
reveal the film cartridge
If a film is present, turn the camera upside down until the
film cartridge falls out
Take a new film
(6) from its
place it in the camera
Then close the camera. Note that the first image is
lost as it is already exposed. Release the shutter and close/open the camera
to advance to the next position. Then release the shutter again.
The camera is now ready for taking pictures. In the images below, the camera is
loaded with a 36 exposure colour film.
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© Crypto Museum. Created: Wednesday 07 April 2010. Last changed: Saturday, 01 July 2017 - 22:28 CET.