Digital Image Format

The current storage format commonly used in digital cameras casio Exilim Zoom EX-Z150 charger have RAW format and JPEG format. Early digital cameras also TIFF format, although the image quality TIFF format images, but because of large amount of data stored for a long time, has been basically out of digital camera market.

RAW format is a RAW format digital camera CASIO Exilim EX-S600SR Charger imaging sensor image data is stored directly after the format, which stores the original image encoded data, not compressed, so the image is also referred to as digital film. RAW format required by the "digital darkroom" to the image exposure, gradation curves, white balance, sharpness and other parameters to adjust, to get high-quality photos. RAW favored by professionals, while in the non-compressed and non-destructive format, it is the advantage of small storage capacity, making the storage time and shorten the interval between single shot to improve shooting efficiency.

But the RAW need special software to deal with, in the shooting, digital camera's LCD screen can only be seen as a JPEG preview copy provided, in order to avoid wasting storage space, a copy of the compression ratio, image quality is rather poor. Currently, only very few SLR digital cameras CASIO Exilim EX-S770BE Charger and consumer digital cameras only support the RAW format.

JPEG format, JPEG format is a lossy compression format, that would be lost during the compression part of the original image data, and these data can not be restored.

JPEG is an excellent image quality can provide file compression format. The camera set to JPEG format, it photographs inside the camera through the image processor has finished processing, you can direct a film. JPEG compression ratio of 10:1 to 40:1, usually between the memory card can greatly reduce the space, increasing the number of pictures taken to speed up the rate of photo storage, but also accelerated the speed of continuous shooting, so widely used, is All digital cameras CASIO EX-Z75 Charger are equipped with the storage format.

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APS-C mean?

All references to the full size ( full frame ) digital SLR CASIO EX-Z75 Charger (now generally referred to as the DSLR or directly call SLR camera ), usually when we will refer to APS-C DSLR cameras. So, aps-c is the mean?

Whether it is full frame or APS-C , in fact, is the standard measure of the size of the image sensor. For example, we mentioned before, full-size ( full frame ), refers to the size of image sensors as large as the traditional 35mm film (36 * 24mm).

The APS-C it? Its size is about 23 * 15mm or so. Different brands use the size of the image sensor may be slightly different. Such as Sony , Nikon , Pentax and the like of the companies, their products focal length conversion factor is 1.5, so the slightly larger image sensor, about the size of 24 * 16mm, and Canon 's products focal length conversion factor is 1.6, so smaller . Such as the EOS 600D is only about 22.3 * 14.8mm, but this difference is not decisive, so were all classified as APS-C category.casio Exilim Zoom EX-Z150 charger

Olympus and Panasonic use the 4 / 3 system, including electronic cameras use a single Micro 4 / 3 system, the image sensor even smaller, about 17 * 13mm in size, so the focal length conversion factor is 2. In addition, there is a specification called the APS-H .

This specification SLR image sensor size is about 28 * 18.5mm, not the big full-size SLR cameras, but all non-full frame SLR camera was the biggest. Currently, only the Canon EOS 1D series of SLR cameras use four sensors of this size. In the current SLR camera market, APS-C DSLR-phase machine has an absolute majority. In addition to Olympus and Panasonic SLR cameras, as well as just mentioned, Canon EOS 1D series, is all the other SLR cameras APS-C DSLR cameras. So, normally, we also put APS-C SLR full frame SLR camera as a non-representative, and full-size SLR cameras CASIO Exilim EX-S770BE Charger for comparison.