Tag Model S

1954… Yashica Flex Model S

Chris and Carol Leave a comment

When Yashima started making twin-lens reflex cameras in a small factory along the shores of Lake Suwa in Nagano Prefecture, they were but one of hundreds of “start-ups” entering the already crowded Japanese camera manufacturing business. Many would fail – and fail quickly they did. But little Yashima, with two brothers from Nagano at the helm, managed to take a big step – to make a second and then third camera.

The first was the Pigeonflex (great name but how do you grow with a name like that), then came the Yashima Flex and Yashica Flex B. In 1954 (late) they built the now famous Yashica Flex Model S. The first TLR in the world with an attached exposure meter! Yep, in the world! None of the already established players had produced one like that. The meter was supplied by Sekonic and screwed to the side of the body and hidden light sensors under the name flap sent electricity to the meter. Bingo. Meter and camera merged! 1954

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Cropped scan from a rather rare (in the US) Yashima sales flyer for the Yashica Flex Model S. It’s one of the earliest pamphlets around for this camera.

The light sensing cells were built-in under the flap that was the nameplate. You would open the flap and the maximum amount of light would strike the cells and send an electrical signal to the meter  (#1 above). You then used # 2, 3, 4, and 5 to “compute” your exposure settings. Simple except that you needed the eyesight of an eagle to actually see the numbers on the scale. It it was real sunny out, you didn’t need to lift the flap to get an accurate reading – there were 12 holes in the flap that would let in enough light to set the exposure.

In a testament to the designers, many of these early exposure meters still function even after 6 decades of use. But, many have fail too mostly caused by a failure of the wire to meter connection. The cells are fine (no batteries, sun powered).

As always we appreciate your visit. We’re glad to share some of our collection of early sales material and of course to chat up our Yashima-Yashicas. In the spirit of fair play, we ask that you do not copy or post our images in your blog or post without our permission. Thanks.

Chris & Carol

Pentamatic S – 1961 to 1962

Chris and Carol 10 Comments

The Pentamatic S… the last true Pentamatic in the short lived series of SLRs from Yashica. The Pentamatic II is the hardest to find from a collector’s standpoint as they were only available for sale in Japan with the S close behind.

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The Pentamatic S. The last camera in the short lived Pentamatic series.

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Pentamatic cameras tend to have very well designed film paths and film chambers. We rarely find corrosion and the chambers are large and easy to keep clean. The Nicca inspired cloth focal-plane shutter in this example is super clean and shows no white mold spots.

The Pentamatic S pictured above, the serial number is NO. 140572. Our other S is NO. 140294. These numbers decode to… 1=1961, 4=April, and the last four digits equal the sequential production numbers. The S models were not produced in great numbers so it is possible that both of these cameras were made during the same month as they are within 300 units of one another. Another serial number in our database is… NO. 141796 which suggests that it was the 1,796 th unit made in April of 1961. Interestingly the serial number of the model S in Yashica’s instruction booklet is NO. 140893. It is odd that the camera in the booklet has a higher production number than two cameras we own.

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The only difference between the S and the original Pentamatic ’35’ is the notch in the shutter speed dial on the S. It is used to couple the clip-on exposure meter to the dial.

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The biggest changes in the S from the original… the shutter release button is no longer at a 45 degree angle but its position on the body is the same. The S adds a self-timer and the light meter (exposure meter) lug on the face just below the shutter speed dial.

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The lug for the neck strap has been relocated to the front from its previous position (on the side). It’s interesting to note that this lug is super corroded while the lug on the other side is not.

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As we mentioned in the previous post on our blog, the Pentamatic series of cameras are prone to mirror lock-up. This S is currently in the locked-up position and has resisted my attempts at freeing it. It had been working at the higher shutter speeds (1/125 and higher) but now it sticks at all speeds. Ugh!

In summary… the Pentamatic S is a very worthy camera and is built like a tank. The S went back to using the Auto Yashinon f/1.8 5.5cm lens which was the standard lens on the original Pentamatic ’35’. The Tomioka Optical built lens is sharp and smooth. The S allows for the attachment of a separate exposure meter on the front lug (where the “S” is) and can couple with the shutter speed dial. Still a long way from TTL metering but at least headed that way.

Thanks for your visit!

Chris and Carol

Please visit our online store at https://www.ccstudio2380.com for a nice selection of classic film cameras and vintage photo accessories.