Tenax II

Tenax II is a classic folding camera manufactured by Zeiss Ikon, introduced in 1937 and produced until approximately 1941. It's a notable camera due to its use of 35mm film, but producing square 24x24mm images rather than the standard 24x36mm rectangular format. This format allows for a larger image size compared to smaller 35mm frame sizes common at the time.

The Tenax II is characterized by its compact, robust design and high-quality construction. It typically features a coupled rangefinder, providing accurate focusing, and a fast lens, often a Carl Zeiss Tessar. Shutter speeds are generally controlled via a Compur-Rapid shutter.

One distinctive feature of the Tenax II is its rapid film advance mechanism, often described as a "trigger" or "lever" located on the camera's front. This lever allows for quick and easy film advancement and shutter cocking with a single thumb movement, facilitating a faster shooting pace than many contemporary cameras.

The Tenax II is a desirable camera for collectors and users interested in vintage photography due to its build quality, unique format, and fast operation. Its square format encourages a different approach to composition compared to standard rectangular 35mm photography. The camera has gained a reputation for producing sharp, high-quality images, particularly when equipped with the Tessar lens.