Bronica rf645 bronica full#

Lens hoods are often designed to fit onto the matching lens facing either forward, for normal use, or backwards, so that the hood may be stored with the lens without occupying much additional space. For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens. Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood. The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens.

The reduced distance to the film plane also suppresses the possibility of internal reflection, resulting in a crisper image.ДЄ lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. This simple, straightforward design materializes compactness in chassis and improves efficiency in aberration compensation.

Bronica rf645 bronica full#

The RF645 takes full advantage of this with symmetrical type wideangle (Super Angulon and Viogon type) optical design. The sharp, highly vivid images and high contrast make it a fine example of symmetrical wideangle lens design.Д¬ompared with the SLR camera, which requires a quick return mirror between the back of the lens and the film plane, the rangefinder camera allows for a shorter clearance to the film plane. This is a wideangle 45mmF4 lens conversion) with a 75.1-degree angle of view. The 45mm lens features as standard an Albada type external viewfinder, which renders precise framing over a wide field of view.

Aberrations are thoroughly corrected, resulting in superb optical performance. The three lenses designed for this camera are the wideangle 45mm F4 (equivalent to 28mm in 35mm format), the standard 65mm F4 (40mm equivalent), and the telephoto 135mm F4.5 (80mm equivalent).ДЄimed at producing the best possible image quality, our engineers selected the ideal optical composition for each lens. (Kazuyasu Noguchi, President) announces the RF645, a new medium format 6x4.5 coupled rangefinder camera with interchangeable lenses, released under the Bronica brand. September 20, 2000, Photokina Cologne, Germany - Tamron Co., Ltd. Tamron Announces The New Bronica RF645 6x4.5 Format Coupled Rangefinder Camera With Interchangeable Lenses *) Sources of data: Manufacturer's technical data