Viseur

The term "viseur" is a French word that translates directly to "viewfinder" in English. It is primarily used in the context of photography and optics to refer to the device through which a photographer or camera operator frames and focuses the image they intend to capture.

In photography, the viseur allows the user to see what the lens is seeing (or, in some cases, a close approximation thereof) before taking a picture. There are different types of viseurs, each with its own advantages and disadvantages. Some common types include:

• Optical Viewfinders (OVF): These use a system of lenses and mirrors to allow the photographer to see directly through the camera's lens (or very close to it). They are known for providing a bright, clear image with no lag. A major subtype is the Through-The-Lens (TTL) viewfinder where the view is directly through the taking lens via a mirror/prism.

• Electronic Viewfinders (EVF): These use an electronic display to show the image captured by the camera's sensor. They allow for features such as exposure simulation, focus peaking, and the display of camera settings directly in the viewfinder.

• Rangefinder Viewfinders: These viewfinders are found in rangefinder cameras. They are separate from the taking lens and use a parallax system to assist in focusing.

The quality and type of viseur can significantly impact the photographer's experience and the quality of the final image. Considerations include field of view, magnification, clarity, and the presence of any distractions or distortions.