The first electronic camera 30 years ago, the images stored on tape! Fifteen years later, digital cameras, $ 30,000 a few brave photographers used their photos on a large hard disk, which was connected to the camera by a cable. Today, it is much better, because you can use tiny semiconductor devices called flash memory to store your photos until you transfer to a computer for permanent storage. A digital SLR false has two components that you want to know:

Buffer:
Your digital SLR camera gets siphoned bit sensor and leads to a particular type of high-speed memory called buffer. Thank you to the buffers, you can continue taking pictures while in private deals with the transfer of your most recent photos on the map of cinema. The size and speed of the buffer determines how many pictures you can take in a row. Digital cameras typically take 5 to allow 30 shots in a row, and fired in continuous (burst) mode good for 2.5 to 10 images per second until the buffer holds. A faster, larger buffer is better.

Memory Card:
Memory cards have their writing speed, which determines the speed of the card can accept images in the buffer. There’s no standard measurement for this speed, so you can find Memory cards called 40X, 80X, 120X, 133X, Ultra, or extreme.

However, the paper speed limit of recovery, if you want to photograph sports and take lots of pictures in a row. The rest of Once the camera is probably much faster than a finger on the trigger. DSLRs typically use current or CompactFlash (CF) or Secure Digital (SD) memory cards, as shown in Figure 2-11. They are essentially equivalent in terms of speed, cost and capacity, even though SD cards are smaller than their counterparts in CF. You’ll also find mini-hard disk with Compact Flash form factor. Some cameras use xD cards or with an adapter, Sony Memory Stick PRO Duo.

In recent months, the cost of flash memory is falling, which is great for users of digital cameras, because the reduction in costs has come at the same time specification of the base resolution for digital SLR 6MP increased from 10 megapixels and beyond. More megapixels need to provide greater storage capacity cards. Today you can buy an 8GB CompactFlash card for about half the cost of a card of 4 GB or more than a year ago, even if you buy one of top models “faster” to accelerate the speed of writing.

If your SLR camera uses Secure Digital (SD) memory cards with capacity display of 2 GB or more to ensure they’re compatible with the camera and your memory card readers. Some older cameras and other devices do not accept cards of 2 GB or more of everything. To overcome this problem, a new format SDHC (Secure Digital High Capacity) was developed for the capacity of 4 GB to 32 GB, but only works with products that are specifically compatible with SDHC. The latest digital SLR cameras that use SD memory, like the Nikon D40, D40, D80 and Pentax K10D, support for the new type of memory.

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