WebOct 28, 2024 · Aperture is the size of the opening in the lens. Some lenses have fixed apertures, but most photographic lenses have variable apertures to control the amount of light entering the lens. This aperture is regulated by a diaphragm made of overlapping blades that can be adjusted to vary the size of the opening through which light passes. … WebThe optical design of this fast ultra-wide angle lens was completed already in 1971, but the production did not begin until 1976, when multi-layer coating became part of mass production of CZJ DDR lenses. Patented in DDR in 1977. In addition to the regular version for all Praktica 35mm SLR cameras with the M42 screw mount, an "electric" version ...

diaphragm - Wiktionary

WebA diaphragm is a camera component within a lens comprised of overlapping metal blades (the iris) that open and close to change the size of the opening (they allow different levels … WebOblique illumination is generally achieved by placing a slit or sector stop beneath the lower lens and aperture diaphragm of the condenser, allowing only oblique light passing through the narrow opening of the stop to illuminate the specimen. The effect of the oblique lighting is to shift the zeroth order of light passing through the specimen ... canning simple syrup

Carl Zeiss Jena DDR Sonnar 180mm F/2.8 LENS-DB.COM

WebJan 3, 2024 · The diaphragm is introduced very close to the lens, where objects are maximally defocused, so that every ray from every object passes through the lens. … WebJul 28, 2024 · Specular out-of-focus highlights have appeared in photographs since the first photos were taken through lenses. In 1997, Photo Techniques magazine introduced the word “bokeh” to the photography world’s vernacular and the out-of-focus areas of photographs have been scrutinized ever since. Before the term, there was certainly … WebA version with the same optical formula but different design of the lens barrel and shorter closest focusing distance (0.8m vs 1m). Most units had 10 aperture blades, but the earliest ones produced for the Contax S camera had 12. Typical application Class: Fast full-frame short telephoto prime lens Genres or subjects of photography (2): canning simple syrup recipe