A Twin Lens Reflex (TLR) camera features two lenses of the same focal length: one for viewing and focusing, and the other for exposing the film. This design allows the photographer to compose and focus the image through the viewing lens while the taking lens captures the photograph.
TLR cameras are popular in medium-format photography and are valued for their precise focusing, parallax-free viewing, and stable handling. Understanding the mechanics of TLR cameras enables photographers to achieve sharp, well-composed images with a unique perspective and professional-quality results.