F24 camera

The F24 camera is a 1920s British camera used for aerial reconnaissance by British and Allied armed forces into the mid-1950s. It is widely and erroneously referred to as F.24 or F-24.

Design and development

The outline design of the F24 camera was carried out by the Royal Aircraft Establishment at Farnborough, and it was introduced in 1925. Detailed design, and most production, was by Williamson Manufacturing Company Ltd of Willesden Green, London NW.10. The F24 was designed to be lighter and smaller than the F8 camera of 1919, but the F8 continued to be used in less demanding installations. The main component units of the F24 are a body with roller blind focal plane shutter, gearbox, film magazine, and lens cone. Image film format is 5"x5", on 5" wide roll film, with magazine capacity up to 250 exposures (the F8 offered images up to 8"x7.5" on 9" wide film). Shutter speed is preset between 1/100s and 1/1000s.

By about 1940, most configurations of the F24 included a Dallmeyer Pentac lens with focal length 8", aperture f2.9, with either a Type 21 hand adaptor with two side handles, or a Type 25 fixed mounting and Type 35 control box and motor drive. Weight of a typical hand-held version is about 20 lb. Prior to 1940, available lenses included focal lengths of 3.25" (f5.6), 5" (f2.8), 6", 10.5". In 1937, a 14" (f5.6) lens was introduced, followed in late 1940 by a 20" (f5.6) lens, and in 1942 by a 36" lens. Longer lenses, and larger image formats, offered more detailed images from extremely high altitudes.

Camera

A camera is an optical instrument for recording images, which may be stored locally, transmitted to another location, or both. The images may be individual still photographs or sequences of images constituting videos or movies. The word camera comes from camera obscura, which means "dark chamber" and is the Latin name of the original device for projecting an image of external reality onto a flat surface. The modern photographic camera evolved from the camera obscura. The functioning of the camera is very similar to the functioning of the human eye.

Functional description

A camera may work with the light of the visible spectrum or with other portions of the electromagnetic spectrum. A still camera is an optical device which creates a single image of an object or scene, and records it on an electronic sensor or photographic film. All cameras use the same basic design: light enters an enclosed box through a converging lens and an image is recorded on a light-sensitive medium. A shutter mechanism controls the length of time that light can enter the camera. Most photographic cameras have functions that allow a person to view the scene to be recorded, allow for a desired part of the scene to be in focus, and to control the exposure so that it is not too bright or too dim. A display, often a liquid crystal display (LCD), permits the user to view scene to be recorded and settings such as ISO speed, exposure, and shutter speed.

Camera+

Camera+ is an app for Apple's iOS mobile operating system developed by tap tap tap. The app serves as an alternative to the standard iOS camera app, primarily adding basic and advanced editing tools (including special effects and lighting filters), an image stabilizer, and integrated sharing with Facebook, Flickr, and Twitter.

Camera+ has received generally positive reception; PC Advisor gave the app 4-and-a-half stars out of 5 and declared it a "must-have" app for iPhone photographers, praising its advanced editing functionality for allowing users to "[make] poor snaps into great photographs that will wow your friends", making the built-in camera app feel like a pinhole in comparison.Wired gave the app a 9 out of 10, describing it as a "secret weapon" for photographers, and stating that it contained so much functionality that it was "too easy to get lost in the deeply layered menus or forget where you found that killer function the other day." In May 2012, Apple revealed that Camera+ was the 10th most popular paid app of all-time among iPhone users.

Generic top-level domain

Generic top-level domains (gTLDs) are one of the categories of top-level domains (TLDs) maintained by the Internet Assigned Numbers Authority (IANA) for use in the Domain Name System of the Internet. A top-level domain is the last label of every fully qualified domain name. They are called generic for historic reasons; initially, they were contrasted with country-specific TLDs in RFC 920.

The core group of generic top-level domains consists of the com, info, net, and org domains. In addition, the domains biz, name, and pro are also considered generic; however, these are designated as restricted, because registrations within them require proof of eligibility within the guidelines set for each.

Historically, the group of generic top-level domains included domains, created in the early development of the domain name system, that are now sponsored by designated agencies or organizations and are restricted to specific types of registrants. Thus, domains edu, gov, int, and mil are now considered sponsored top-level domains, much like the themed top-level domains (e.g., jobs). The entire group of domains that do not have a geographic or country designation (see country-code top-level domain) is still often referred to by the term generic TLDs.

F24

F24 or F.24 or F-24 or F.XXIV may refer to :