Types of storage cards & film types

Types of storage cards & Film Types

Memory Card

A memory card is an electronic data storage device which is used to store digital data they are used in many electronic devices such as mobile phones, video game consoles MP3 players etc. The first uses of the memory card take back to the 1990’s when PC Cards (PCMCIA) were the first memory card formats to be commercialized but are now mainly used in industrial applications and to connect I/O devices such as modems. In the 1990s, a number of memory card formats smaller. The PC Card arrived which included a CompactFlash, SmartMedia, and Miniature Card.

By 2005 however, SD/MMC had nearly taken over SmartMedias spot, though not to the same level and with stiff competition coming from Memory Stick variants, as well as CompactFlash. In industrial fields, even the venerable PC card (PCMCIA) memory cards still manage to maintain a niche, while in mobile phones and PDAs, the memory card market was highly fragmented until 2010 when micro-SD came to dominate new high-end phones and tablet computers. Since 2010 new products of Sony (previously only using Memory Stick) and Olympus (previously only using XD-Card) are offered with an additional SD-Card slot. Effectively the format war has turned in SD-Cards favour.

Floppy Disks

A floppy disk is a portable computer storage device that permits easy handling of data. Commonly used with personal computers, notebook computers, and word processors, such disks consist of flat, circular plates made of metal or plastic and coated with iron oxide. When a disk is inserted into the disk drive of a computer, information can be magnetically imprinted on this coating, which will thereafter permit easy location and retrieval of the same data. Floppy disks were introduced during the 1970s. Although they cannot store as much data as disks and the data cannot be retrieved as easily, floppy disks have become extremely popular in situations where flexibility, low cost, and easy use are important. Today the floppy disk has become an indispensable tool for people working with personal computers and word processors.

Black and White film

All photography was originally monochrome, or black-and-white. Even after colour film was readily available, black-and-white photography continued to dominate for decades, due to its lower cost and its "classic" photographic look. The tones and contrast between light and dark areas define black-and-white photography. It is important to note that monochromatic pictures are not necessarily composed of pure blacks, whites, and intermediate shades of grey, but can involve shades of one particular hue depending on the process. The cyanotype process, for example, produces an image composed of blue tones. The albumen print process, first used more than 150 years ago, produces brownish tones.

Colour Film

Colour film is a part of the zone system which is a technique for determining film exposure and development. Usually this does not lend itself to variations in development time. The use of the Zone system with colour film is similar to that with black-and-white roll film, except that the exposure range is somewhat less, so that there are fewer zones between black and white. The exposure scale of colour reversal film is less than that of colour negative film, and the procedure for exposure usually is different, favouring highlights rather than shadows; the shadow values then fall where they will. Whatever the exposure range, the meter indication results in a Zone V placement.