35mm Focal-Plane Shutter Scale Focusing Camera
JS (Popular Model with Slow Speeds)
- Europe, Asia, Oceania
Camera with slow shutter speeds from 1 sec. to 1/20 sec. but no rangefinder. Geared for close-ups, photomicrography, astrophotography and other special applications which required slow shutter speed speeds.
According to Canon records, only 50 were made. Other details and the original price are unknown. Around 1939, Seiki-Kogaku was starting to make its own lenses. It made a prototype, Tessar-type 50mm f/4.5 lens (4 elements in 3 groups) and Sonnar-type 135mm f/4 lens (4 elements in 3 groups) without a rangefinder coupling. “Serenar” was chosen from among in-company suggestions for the name of the lenses. The name is probably based on the name of a sea on the moon.
It was not until 1947 when the company started making usable lenses for its cameras.
|Type||35mm focal-plane shutter camera|
|Picture Size||24 x 36 mm|
|Normal Lens||Nikkor 50mm f/4.5|
|Lens Mount||Threaded (non-universal)|
|Shutter||Two-axis, horizontal-travel focal-plane shutter with cloth curtains. Single-axis rotating dial for 1, 1/2, 1/4, and 1/8 sec., and single-axis rotating dial for Z, 1/20, 1/40, 1/60, 1/100, 1/200, and 1/500 sec.|
|Viewfinder||Reversed Galilean viewfinder. Focusing with distance scale.|
|Film Loading &
|After top plate removal, drop-in bottom loading. Advances with camera-top knob.|
|Frame Counter||Manually set from 0 to 39 at base of camera-top rewind knob.|
|Film Rewind||Camera-top knob|
|136.5 x 69 x 30.5 mm, weight unknown|