Mamiya/Sekor CWP

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The name Mamiya-Sekor had long been used as branding on the company's lenses, but this is the earliest camera identified by this on its body nameplate, including a distinctive slash. This model is frequently known to collectors by its US-specific name Mamiya/Sekor CWP[1] but this is not marked on the camera itself[2] and elsewhere it was called the CP or given a nameplate reading "Mamiya" alone.

Unlike the Exakta-mount Prismat NP, this was the first 42mm screw-mount SLR from Mamiya. It was launched in 1964, the same year as the quite similar Canon FX, but two years after the Minolta SR-7. It stayed on the market for two years. It has a built-in exposure meter with the CdS cell positioned just in front of the wind-on lever. A High - Low meter range switch is situated coaxially under the shutter speed dial, on which the film speed is set lifting and turning it using a scale on the perimeter. The meter read-out window is next to the rewind knob, showing F-values to be transferred to the lens aperture ring. The camera has neat design, but a slightly rough and heavy feel. The focusing screen has a micro prism centre spot, surrounded by a ground collar and Fresnel rings. The finder has a 19mm (¾") thread for accessories. An automatic frame counter is visible under a window in front of the wind lever. The standard lens is the Mamiya/Sekor 1:1.8 f=55mm in black with a 52mm chrome filter ring, and an M - A slide aperture selector switch.

The CWP body has some slightly out of the ordinary features; the self-timer at the front has a release button in the wind lever hub. Lack of a switch for the meter means continuous drain on the 1.35volt mercury cell sitting in its base compartment; covering the cell minimizes the drain. The rewind crank is raised to disengage the film cassette, but the back door has a latch at the side. The tripod socket is moved forward on a base plate protrusion found on a few other Mamiya models. The strap eyelets are stamped out, possibly of stainless steel. However, TTL metering was taking over, and the much improved model TL/DTL series, based on the CWP, followed.


  1. This is the name shown on the manual linked below.
  2. Launch advertising in the US called it the "f2" (for the original bundled lens), even after it shipped with an f/1.8 lens; or later simply as "the Mamiya/Sekor."