CR2文件包含佳能相机未压缩和未接触的原始图像数据。这些原始文件有时也被称为数字底片。原始文件的目的是从相机的传感器获取最大信息，以便以后调整图像（例如白平衡和颜色分级）。
CR2 file contain uncompressed and untouched raw image data from Canon cameras. These raw files are also sometimes called digital negatives. The purpose of raw files is to get maximum information from the sensor of the camera to give possibilites to adjust the image later (e.g. white balancing and color grading).
