The Decora Optina Folding Camera is a 1950s medium-format folding camera produced by the German manufacturer Dacora-Kamerawerk. It was specifically manufactured as a store brand variation for the Eaton's of Canada department stores. Using 120 roll film creating 6x6cm images, the camera is known for its compact, self-erecting bellows design and simple, sturdy mechanics.
Camera Key Features:
- Production Era: Introduced in the 1950s (typically listed as ~1952).
- Film Type: 120 roll film producing 6x6cm square negatives.
- Image Format: 6x6 cm.
- Lens: Typically equipped with a Subita f/6.3 / 75mm Anastigmat lens.
- Shutter: Usually a simple Singlo or Vario shutter with limited speeds (e.g., 1/25, 1/75, and Bulb mode).
- Design: A self-erecting folding design where the lens and bellows pop out when the front cover is opened.
The Watameter Rangefinder is a German-made accessory rangefinder designed to help photographers achieve sharp focus by precisely measuring distance. It mounts to a camera's accessory (cold) shoe and uses a split-image or superimposed-image system to determine the distance to a subject. Once the distance is measured with the Watameter, the photographer must manually transfer that reading to the camera's focus ring to ensure the shot is in focus.
Rangefinder Key Features:
- Triangulation System: It works on the coincidence principle, where you turn a knurled thumbwheel to align two ghostlike images (one often in a yellow rectangle) into a single, superimposed image.
- Calibration Adjustments:
- Distance: A small screw or inner wheel on the main thumbwheel allows you to calibrate the meter so that infinity matches the actual horizon.
- Vertical Alignment: A separate small wheel on the side (typically the left) adjusts the vertical alignment of the two images to make them easier to merge.
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