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10-05-2010, 06:26 PM   #1
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Pentax S (Tower 26)

The first 35mm Pentax SLR with pentaprism, the 'AP' model, was soon followed by the 'S' model. The Asahi Pentax S was introduced in April 1958 and discontinued in May 1959. Differences between the Asahi Pentax 'AP' and the Asahi Pentax S include the progression of shutter speeds, with the Asahi Pentax S featuring the modern progression of speeds, and a different film reminder dial. The Asahi Pentax S was available in either satin chrome or black finish. The Asahi Pentax S is recognizable in that it bears the model designation 'S' below the serial number. Some source cite a total production of between less than 4,000 units to about 4,400 units. The standard lenses for the Asahi Pentax S were the 55mm f/2.2 Takumar or the 55mm f/1.8 Takumar in Pentacon/Pentax M42x1 screw mount.


Asahi Pentax S
Also marketed as
Tower 26
Year introduced
1958
Year discontinued
1959
Mount
M42
Automatic aperture stop down
No
Metering
No light meter
Exposure modes
Manual, B
Shutter speeds (auto)
Not applicable
Shutter speeds (manual)
B, 1 - 1/500s, X
Shutter speeds (mechanical)
B, 1 - 1/500s, X
Self timer
No
Mirror lock-up
No
Auto bracketing
Not applicable
Multiple exposures
Yes
Winder
No
Flash hot shoe
No
Built-in flash
No
TTL/P-TTL flash
No
Flash sync speed
FP and X terminals - 1/50s?
Flash exposure comp
Not applicable
Viewfinder type
Pentaprism
Diopter correction
No
Exchangeable screen
No
Depth of field preview
None at the time of production. Available through switch on later lenses
Image size
24 x 36 mm
Battery
None
Size (W x H x D)
145 x 92 x 50mm
Weight
570g
Comment
The camera had two shutter speed dials. The one on the top plate sets the fast speeds: 1/500, 1/250, 1/125, and 1/60s, the one on the front the slow speeds (controlled by a timer): 1/30, 1/15, 1/8, 1/4, 1/2, and 1s. Other features: Automatic frame counter with manual reset, X and FP standard sync sockets, non-interchangeable back, rewind button and tripod socket on bottom plate, loaded film reminder dial. Period of production: April 1958-May 1959.


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Last edited by Ole; 10-10-2010 at 04:00 PM.
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