The Spotmatic II was released in 1971, along with the introduction of the S-M-C line of Takumar lenses. The meter and film transport was improved from the original Spotmatic, a hotshoe was now included and the ISO range was increased to 3200. There were a number of 'Motor Drive' editions produced by Pentax beginning in 1969 with the original Spotmatic and ending with the ES II in 1975.
The SP II Motor Drive System was offered in 2 different packages. The 'Set 36' consisted of the Spotmatic II camera which had been modified to accept the motor drive system, a SMC Takumar 50/1.4, the motor drive unit, the battery grip and a battery loader for AA batteries. The 'Set 250' consisted of the Set 36, plus a bulk film magazine capable of accepting 250 exposure bulk film.
Asahi Pentax Spotmatic II Motor Drive
Also marketed as Honeywell Pentax Spotmatic II Motor Drive
Year introduced 1971
Year discontinued 1976
Mount M42
Automatic aperture stop down Yes
Metering Stop down, centerweight
Meter range EV 1 to 18
ISO range 20 to 3200
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. Optional external motor drive 2.5 - 3 fps
Flash hot shoe Yes
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
Battery grip/pack Yes, AA and Rechargable for the motor drive
Size (W x H x D) 143 x 93 x 88mm (with standard lens)
Weight 622g
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