Image Recording And Processing - Canon EOS D60 Service Manual

Part 2: Technical Information

1.2 Image recording and processing

1) Imaging engine
The EOS D60's imaging engine (system LSI) is an improved version of the EOS
D30's imaging engine that was designed to incorporate primary-color filters. The
major features are as follows:
• Newly-developed signal-processing algorithm
• Faster signal processing
• Faster JPEG compression and decompression
• Thumbnail image-generating circuit produces better image quality
2) Image quality
Images can be recorded in one of six JPEG settings (lossy compression) and
RAW (lossless compression)/12 bit). The EOS D60 has two more image quality
settings (Middle/Fine and Middle/Normal) than the EOS D30 for a total of seven
image quality settings. You can select the image quality setting according to the
pixel count or compression rate.
Also, the EOS D60's RAW images have a JPEG-Middle/Fine image in the
thumbnail-recording area within the .crw file. By using the dedicated driver
(provided), you can now extract the JPEG file from the RAW image.
With the EOS D30, the image quality was fixed at Large/Fine in the Easy
Shooting Zone modes. However, with the EOS D60, you can set any image quality.
3) ISO speed setting
The ISO speed can be set to 100, 200, 400, 800, or 1000. All the ISO speeds are
equivalent to the respective film speeds.
Although ISO 1600 is provided by the EOS D30, the EOS D60 does not. Since
the EOS D60's imaging element has more pixels, the smaller pixel size results in
lower sensitivity and S/N ratio. Since the EOS D30's image quality at ISO 1600
would be difficult to obtain with the EOS D60, ISO 1600 was not included.
Image Quality
2-4