Monday, April 16, 2012

All About Memory Cards For Cameras: Features And Characteristics

By Rick Newman


Like all the other things digital memory cards for cameras come in all shapes and sizes. Compact and small these cards serve the basic purpose of storing images. A particular camera supports various numbers of cards through multiple card slots or by variations of a common format.

These chips work on flash memory which is not volatile and works without the supply of power. These chips are such designed such that they can store in them a large number of print-quality pictures. The design of the card and the capacity it holds varies from camera to camera.

The most confusing aspect of the memory chips for cameras is their speed. Some manufacturers quote the rate of speed in MBPS while others just make use of the suffix 'x'. 1x is equivalent to 150kbps. In the SD media formats, card system is used. A class 2 card gives a minimum transfer rate of 2 mega bytes per second, and thus it is an easier method to classify speed.

Standard Digital (SD) is the major type of memory chips. Most of the digital cameras record the images and the movies in one or more varieties of SD memory chips. The size of these chips is similar to the postage stamps and they are available at very cheap rates.

Now days the SD chips are being replaced by the SDHC format (HC means 'high capacity'). These have a large range of memory from 4GB to 32GB and have better speed and performance. Amazingly they have the same old dimensions. SDXC cards though not too common types have also emerged. They offer capacities from 32GB to 64GB and might be raised to 2TB in the upcoming years. The usage is in DSLRs and other high definition (HD) cameras.

Although many DSLR cameras have adopted the SD formats but the professional DLSRs maintain support for the Compact Flash media cards for cameras. They are larger, stronger than SD chips and more suitable to use in adverse conditions.




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