Early Spotmatics were produced from July 1964 through 1965 sometime, as compared with 1965 through 1973 for the 'Late' version. It is historically interesting to note that Asahi produced their millionth
SLR in 1966, so the early Spotmatics belong to the era before Asahi's millionth
SLR was produced. The early models are relatively and can be dated to no later than 1965. There are subtle differences that give the early bodies away... differences include cosmetic differences in the self-timer lever, meter switch, top cover attachment method, and film counter height. There are also subtle differences in the focusing screen, lettering font, and even the strap triangle rings. The early part number was 231. The later model part number was 23102. Some appear to have these numbers on the baseplate, but not all. Serials can distinguish them as well... serials starting in the range 10nn800 but lower than 2016000 are early, while 2016000 and above are late models.
Standard Lenses: Super-Takumar 50mm f/1.4 or 55mm Super-Takumar f/1.8 with fully automatic diaphram. Distance scale: 0.45m (1.5 feet) to infinity. Filter size: 49mm. With depth-of-field scale. Equipped with diaphragm preview lever which affords visual check of depth of field. Distance Scale: 45cm (18') to infinity.
Shutter: Focal plane shutter with single non-rotating dial (dial rotates to select shutter speed but remains stationary when exposure is made - this is a reference to earlier cameras that had shutter speed dials that rotated when the exposure was made). Speeds: B, 1-1/1000 sec. Film speed (ASA) setting dial and window on shutter speed dial. Built-in self-timer releases shutter in 5-13 seconds. Shutter curtains of special rubberized silk.
| Asahi Pentax Spotmatic |
Also marketed as Honeywell Pentax Spotmatic | Year introduced 1964 | Year discontinued 1973 | Mount M42 |
Automatic aperture stop down Yes | Metering Stop down, centerweight | Meter range EV 1 to 18 | ISO range 20 to 1600 |
DX ISO range No DX coding | Exposure modes Manual, B | Exposure compensation Not applicable | Exposure memory lock No |
Shutter speeds (auto) Not applicable | Shutter speeds (manual) B, 1 - 1/1000s | Shutter speeds (mechanical) B, 1 - 1/1000s | Self timer Yes, 5 - 13s |
Mirror lock-up No | Auto bracketing Not applicable | Multiple exposures Yes | Winder Ratchet type rapid wind lever. 10° pre-advance and 160° advance angle |
Flash hot shoe No | Built-in flash No | TTL/P-TTL flash No | Flash sync speed FP and X terminals - 1/60s |
Flash exposure comp Not applicable | Viewfinder 0.88x (with 50mm lens) | Viewfinder type Pentaprism finder with Fresnel lens + microprism | Diopter correction No |
Exchangeable screen No | Depth of field preview Yes | Image size 24 x 36 mm | Battery 1.3V mercury PX-400 |
Size (W x H x D) 143 x 92 x 88mm (with standard lens) | Weight 621 g | | |