Macro photography, is extreme close-up photography, usually of very small subjects and living organisms like insects, in which the size of the subject in the photograph is greater than life size . By the original definition, a macro photograph is one in which the size of the subject on the negative or image sensor is life size or greater. However, in some uses it refers to a finished photograph of a subject at greater than life size.
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. 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.
The Pentax K-mount, sometimes referred to as the "PK-mount", is a bayonet lens mount standard for mounting interchangeable photographic lenses to 35 mm single-lens reflex (SLR) cameras. It was created by Pentax in 1975, and has since been used by all Pentax 35 mm and digital SLRs and also the MILC Pentax K-01. A number of other manufacturers have also produced many K-mount lenses and K-mount cameras.
The Sigma SD14 is a digital single-lens reflex camera produced by the Sigma Corporation of Japan. It is fitted with a Sigma SA mount which takes Sigma SA lenses.
The Sigma 30mm f/1.4 EX DC HSM is a wide-aperture photographic lens made by the Sigma Corporation, equipped with Hyper Sonic Motor. The lens was produced in Canon EF mount, Four Thirds System, Nikon F-mount, Pentax K mount, the SA mount, and the Sony/Minolta AF Mount varieties, all of the same optical formula. It shipped with a removable petal-type lens hood. The lens assumes a crop factor of roughly 1.5, and therefore is not usable with on full-frame or 135 film cameras.
The Sigma 70-300mm F4-5.6 APO DG Macro lens is a consumer-level, telephoto zoom lens made by Sigma Corporation. Different versions of this lens are produced that work with cameras from Canon, Nikon, Pentax, Konica Minolta, Sony and Sigma. Additionally, Olympus' 70–300 f/4–5.6 lens for Four-Thirds has the same optical design and specifications as this lens. The lens is packaged with a lens hood.
An ultra wide-angle lens is a lens whose focal length is shorter than the short side of film or sensor.
The 10-20mm F4-5.6 EX DC HSM is an enthusiast-level, ultra wide-angle rectilinear zoom lens made by Sigma Corporation specifically for use with small format digital SLRs.
The Sigma 50mm f/1.4 EX DG HSM is a normal prime lens made by the Sigma Corporation.
The Sigma 8–16mm lens is an enthusiast-level, ultra wide-angle rectilinear zoom lens made by Sigma Corporation specifically for use with APS-C small format digital SLRs. It is the first ultrawide rectilinear zoom lens with a minimum focal length of 8 mm, designed specifically for APS-C size image sensors. The lens was introduced at the February 2010 Photo Marketing Association International Convention and Trade Show. At its release it was the widest viewing angle focal length available commercially for APS-C cameras. It is part of Sigma's DC line of lenses, meaning it was designed to have an image circle tailored to work with APS-C format cameras. The lens has a constant length regardless of optical zoom and focus with inner lens tube elements responding to these parameters. The lens has hypersonic zoom autofocus.
The Sigma's APO 70-200mm F2.8 EX DG OS HSM was announced in 2010, is an EX Lens meaning its in Sigma's high-end line up of lenses Up to 4-stops of correction OS help reduce blurring associated with hand held motion at low shutter speeds. Features a HSM AF motor for silent auto-focus and a constant maximum aperture of f/2.8 throughout the zoom range.
The Sigma 35 mm f/1.4 DG HSM Art is a wide-angle prime lens made by the Sigma Corporation. The lens was announced at the 2012 photokina trade fair.
The Sigma 50mm f/1.4 DG HSM Art lens is a professional-level fixed focal length lens made by Sigma Corporation. It was announced at CES in January 2014 and immediately became highly anticipated amid reports that Sigma was not aiming to compete against Canon or Nikon's 50mm prime lenses but rather the newly released Zeiss Otus 55/1.4, a lens costing US$4000. Retail prices for the Sigma 50mm lens had not yet been announced but it was initially expected that it would sell for around US$1350. However, when official pricing was announced on April 11, 2014, the retail price was even lower: US$950.
The Pentax K-3 II is a flagship APS-C DSLR camera announced by Ricoh on April 22, 2015.
The Sigma 18-35mm f/1.8 DC HSM Art lens is a fast, constant-aperture wide standard zoom lens made by Sigma Corporation. It was announced April 18, 2013.
The Sigma 24mm F1.4 DG HSM Art is an interchangeable wide angle lens for full frame cameras. It was announced by Sigma Corporation on February 10, 2015.
The Leica L-Mount is a bayonet mount developed by Leica Camera AG for interchangeable-lens autofocus digital cameras.
The Sigma 30mm F2.8 EX DN is a standard prime lens for Sony E and Micro Four-Thirds mounts, announced by Sigma in January 2012. Along with the Sigma 19mm F2.8 EX DN, it was part of the first release of Sigma lenses for compact interchangeable lens cameras, and hence the inception of the "DN" line, created by Sigma to cater to these cameras, an offering that in January 2013 was expanded with another lens, the Sigma 60mm f/2.8 DN Art.
