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Sony FE 28-70mm F3.5-5.6 OSS
The Sony FE 28-70mm F3.5-5.6 OSS is a full-frame (FE) variable maximum aperture standard zoom lens for Sony E-mount, announced by Sony on October 16, 2013. It was the first kit lens for Sony's full-frame E-mount (FE) system, and was released on the same day as the Sony α7 and Sony α7R. It is often bundled with various Sony E-mount full-frame mirrorless cameras, and is a less costly alternative to other standard zooms such as the Sony Carl Zeiss Vario-Tessar T* FE 24-70mm F4 ZA OSS. Though designed for Sony's full frame E-mount cameras, the lens can be used on Sony's APS-C E-mount camera bodies, with an equivalent full-frame field-of-view of 42-105mm. Construction The lens has a weather resistant plastic construction with a matte-black finish and rubber zoom and focus rings. The barrel of the lens moves outward from the main lens body as it's zoomed in from 28mm to 70mm. Optical properties The Sony FE 28-70mm F3.5-5.6 OSS shows acceptable chromatic aberration and good bokeh. C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sony E-mount
The E-mount is a lens mount designed by Sony for their NEX ("New E-mount eXperience") and Sony ILCE camera, ILCE series of camcorders and mirrorless interchangeable lens camera, mirrorless cameras. The E-mount supplements Sony's Sony α, α mount, allowing the company to develop more compact imaging devices while maintaining vignetting with 35mm sensors. E-mount achieves this by: * Minimising mechanical complexity, removing mechanical aperture and Focus (optics), focus drive. * Shortening the flange focal distance to 18 mm compared with earlier offerings from Sony which used 44.5 mm. * Reducing the radius of the flange. * Relying on software to correct vignetting The short flange focal distance prohibits the use of an optical viewfinder, as a mirror box mechanism cannot be included in this reduced distance. Therefore, all E-mount cameras use an electronic viewfinder. History Initially, E-mount was implemented on the Sony α Sony NEX-3, NEX-3 and Sony NEX-5, NEX-5 consume ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
APS-C
Advanced Photo System type-C (APS-C) is an image sensor format approximately equivalent in size to the Advanced Photo System film negative in its C ("Classic") format, of 25.1×16.7 mm, an aspect ratio of 3:2 and Ø 30.15 mm field diameter. It is therefore also equivalent in size to the Super 35 motion picture film format, which has the dimensions of 24.89 mm × 18.66 mm (0.980 in × 0.735 in) and Ø 31.11 mm field diameter. Sensors approximating these dimensions are used in many digital single-lens reflex cameras (DSLRs), mirrorless interchangeable-lens cameras (MILCs), and a few large-sensor live-preview digital cameras. APS-C size sensors are also used in a few digital rangefinder camera, rangefinders. Such sensors exist in many different variants depending on the manufacturer and camera model. All APS-C variants are considerably smaller than 35 mm standard film which measures 36×24 mm. Because of this, devices with APS-C sensors a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Standard Zoom Lenses
This is a list of standard zoom lenses that are designed for mirrorless cameras — limit one per brand, focal length, aperture, and zoom mechanism combination. There is no precise definition of the term, but lenses marketed as "standard zoom" usually cover a range of at least 30mm to 60mm in terms of 35mm equivalent focal length with an optical zoom ratio of 2.5× (e.g. 28-70mm) to 5× (e.g. 24-120mm) — the most common being 3× (e.g. 24-70mm). They are called standard zoom lenses, because the midpoint of their zoom range is around 50mm, which is considered a standard or "normal" field of view. History High-quality optical formulas for wider-angle lenses are more difficult and expensive to achieve and produce, so older standard zoom lenses often started at 27mm or 28mm instead of 24mm at the wide end, especially for smaller sensor formats. Full-frame lenses APS-C lenses Micro Four Thirds The is a standard released by Olympus Corporation, Olympus Imaging ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Sony E-mount Lenses
Sony released the following ''SEL'' (for: ''S''ony ''E''-mount ''L''ens) lenses for Sony E-mount cameras since 2010. They are also compatible with Hasselblad E-mount cameras. Some of the lenses introduced into the line have been developed in cooperation with Carl Zeiss AG, Carl Zeiss (as indicated). List of Sony E-mount APS-C zoom lenses List of Sony E-mount APS-C prime lenses List of Sony E-mount full frame zoom lenses List of Sony E-mount full frame prime lenses List of Sony E-mount lens accessories Key: See also * List of third-party E-mount lenses * List of Minolta A-mount lenses * Zeiss Planar * Zeiss Sonnar * * Zeiss Vario-Tessar References {{reflist Sony E-mount lenses, Lists of photographic lenses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distortion (optics)
In geometric optics, distortion is a deviation from rectilinear projection; a projection in which straight lines in a scene remain straight in an image. It is a form of optical aberration that may be distinguished from other aberrations such as spherical aberration, coma, chromatic aberration, field curvature, and astigmatism in a sense that these impact the image sharpness without changing an object shape or structure in the image (e.g., a straight line in an object is still a straight line in the image although the image sharpness may be degraded by the mentioned aberrations) while distortion can change the object structure in the image (so named as distortion). Radial distortion Although distortion can be irregular or follow many patterns, the most commonly encountered distortions are radially symmetric, or approximately so, arising from the symmetry of a photographic lens. These ''radial distortions'' can usually be classified as either ''barrel'' distortions or ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bokeh
In photography, bokeh ( or ; ) is the aesthetic quality of the blur produced in out-of-focus parts of an image, whether foreground or background or both. It is created by using a wide aperture lens. Some photographers incorrectly restrict use of the term bokeh to the appearance of bright spots in the out-of-focus area caused by circles of confusion. Bokeh has also been defined as "the way the lens renders out-of-focus points of light". Differences in lens aberrations and aperture shape cause very different bokeh effects. Some lens designs blur the image in a way that is pleasing to the eye, while others produce distracting or unpleasant blurring ("good" and "bad" bokeh, respectively). Photographers may deliberately use a shallow focus technique to create images with prominent out-of-focus regions, accentuating their lens's bokeh. Bokeh is often most visible around small background highlights, such as specular reflections and light sources, which is why it is ofte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromatic Aberration
In optics, chromatic aberration (CA), also called chromatic distortion, color aberration, color fringing, or purple fringing, is a failure of a lens to focus all colors to the same point. It is caused by dispersion: the refractive index of the lens elements varies with the wavelength of light. The refractive index of most transparent materials decreases with increasing wavelength. Since the focal length of a lens depends on the refractive index, this variation in refractive index affects focusing. Since the focal length of the lens varies with the color of the light different colors of light are brought to focus at different distances from the lens or with different levels of magnification. Chromatic aberration manifests itself as "fringes" of color along boundaries that separate dark and bright parts of the image. Types There are two types of chromatic aberration: ''axial'' (''longitudinal''), and ''transverse'' (''lateral''). Axial aberration occurs when different wavelengt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weather Resistance
Weathering is the deterioration of rocks, soils and minerals (as well as wood and artificial materials) through contact with water, atmospheric gases, sunlight, and biological organisms. It occurs ''in situ'' (on-site, with little or no movement), and so is distinct from erosion, which involves the transport of rocks and minerals by agents such as water, ice, snow, wind, waves and gravity. Weathering processes are either physical or chemical. The former involves the breakdown of rocks and soils through such mechanical effects as heat, water, ice and wind. The latter covers reactions to water, atmospheric gases and biologically produced chemicals with rocks and soils. Water is the principal agent behind both kinds, though atmospheric oxygen and carbon dioxide and the activities of biological organisms are also important. Biological chemical weathering is also called biological weathering. The materials left after the rock breaks down combine with organic material to create soil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sony Carl Zeiss Vario-Tessar T* FE 24-70mm F4 ZA OSS
The Sony Zeiss Vario-Tessar T* FE 24-70mm F4 ZA OSS is a constant maximum aperture full-frame (FE) zoom lens for the Sony E-mount, announced by Sony on October 16, 2013. Though designed for Sony's full frame E-mount cameras, the lens can be used on Sony's APS-C E-mount camera bodies, with an equivalent full-frame field-of-view of 36-105mm. Build quality The lens showcases a minimalist black weather resistant metal exterior with a Zeiss badge on the side of the barrel and no zoom lock to prevent zoom creep. Both the zoom and focus rings are metal. The barrel of the lens telescopes outward from the main lens body as it's zoomed in from 24mm to 70mm. See also * Sony FE 24-70mm F2.8 GM * Zeiss Vario-Tessar *List of Sony E-mount lenses Sony released the following ''SEL'' (for: ''S''ony ''E''-mount ''L''ens) lenses for Sony E-mount cameras since 2010. They are also compatible with Hasselblad E-mount cameras. Some of the lenses introduced into the line have been developed in coope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
35mm Full-frame , a 35 mm anti-aircraft cannon
{{Letter-NumberCombDisambig ...
35 mm may refer to: Film * 135 film, a type of still photography format commonly referred to as 35 mm film * 35 mm movie film, a type of motion picture film stock * 35MM, a "musical exhibition" by Ryan Scott Oliver that features music played to photos Military * Oerlikon GDF The Oerlikon GDF or Oerlikon 35 mm twin cannon is a towed anti-aircraft gun made by Oerlikon Contraves (renamed as ''Rheinmetall Air Defence AG'' following the merger with Rheinmetall in 2009). The system was originally designated 2 ZLA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Full-frame DSLR
A full-frame DSLR is a digital single-lens reflex camera (DSLR) with a 35 mm image sensor format (). Historically, 35 mm was one of the standard film formats, alongside larger ones, such as medium format and large format. Many digital cameras, both compact and SLR models, use a smaller-than-35 mm frame as it is easier and cheaper to manufacture imaging sensors at a smaller size. Historically, the earliest digital SLR models, such as the Nikon NASA F4 or Kodak DCS 100, also used a smaller sensor. Kodak states that 35 mm film (note: in " Academy format", 21.0 mm × 15.2 mm) has the equivalent of 6K horizontal resolution, according to a senior vice president of IMAX. This equates to 10K horizontal resolution in full-frame size. Use of 35 mm film-camera lenses If the lens mounts are compatible, many lenses, including manual-focus models, designed for 35 mm cameras can be mounted on DSLR cameras. When a lens designed for a full-frame camera, wheth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sony α7R
is a Japanese multinational conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions (imaging and sensing), Sony Entertainment (including Sony Pictures and Sony Music Group), Sony Interactive Entertainment (video games), Sony Financial Group, and others. Sony was founded in 1946 as by Masaru Ibuka and Akio Morita. In 1958, the company adopted the name Initially an electronics firm, it gained early recognition for products such as the TR-55 transistor radio and the CV-2000 home video tape recorder, contributing significantly to Japan's post-war economic recovery. After Ibuka's retirement in the 1970s, Morita served as chairman until 1994, overseeing Sony's rise as a global brand recognized for innovation in consumer electronics. Landmark products included the Trinitron color television, the Walkman portable audio player, and the co-developmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
