English Translation :
http://www.canonrumors.com/2009/08/eos-7d-press-release/
To lead the trend of digital single-lens reflex Canon EOS 7D Release
A new generation of digital SLR cameras, EOS 7D achieved in about 18 million effective pixel high-definition, under, up to about 8 / second continuous shooting speed. And the wisdom of carrying high-speed auto-focusing system, and many other new features. EOS 7D is owned by high-performance Canon has long been dependent on a variety of core technology research and development. These high-end technology merges with each other so that the performance upgrades, functionality and ease of use reached a high degree of integration. Next, lets side of the attention to these techniques, the side through the EOS 7D of the seven pairs of performance to explore its advantages. EOS 7D listing dates are expected by the end of September 2009.
One of seven pairs of about 18 million effective pixel + ISO 12800 and the highest point of the double-effect low-noise high-quality high-pixel image sensor and can demonstrate a more sophisticated image. EOS 7D can be shown with the visual impact of the image, it is because of its approximately 18 million effective pixel APS-C size CMOS image sensors. With the development of semiconductor technology and image processing technology advances, EOS 7D not only reached about 18 million effective pixel, but also achieved a low noise performance of the fine image. Its onboard CMOS image sensor is a Canon developed its own products. CMOS wafer process into a more sophisticated production process, not only solved the cause of the high pixel area of each pixel to narrow the problem, but also uses a higher photoelectric conversion efficiency of the new photodiode. In improving the pixel sensitivity at the same time, the transistors within a pixel was modified to achieve a higher S / N (signal to noise) ratio. In order to effectively improve the condensing rate, in addition to using non-gap micro-lens technology, also used to reduce the micro-lens to the photodiode from the new technologies, successful beyond the rate of the previous condenser. EOS 7D commonly used ISO sensitivity of 100-6400, extended ISO sensitivity up to 12800. Image signal transmission is the sequence of the single-channel high-speed reading, while in 8-channel high-speed reading. Compared with the EOS 50D is about 1.3 times faster to achieve about 8 / s high-speed continuous shooting. Low-voltage power supply of high-speed amplifiers and a variety of energy-saving measures adopted to achieve the low power consumption. In addition, replacement of lens and mirror, shutter and other movements generated when the dust sensor also used the corresponding integrated dust removal measures; while carrying from the camera hardware and software, two aspects with dust of the EOS Integrated Cleaning System in the dust function very thoughtful consideration. Shutter unit and a body covered with debris could not easily produce the special material; even accidentally into the dust, you can also make the image by using ultrasonic sensors in front, low-pass filter to vibrate and shake off the dust. Low-pass filter made of fluorine coating the surface, be it hard to shed the dust that has a high viscosity or a damp dust all have a very good dust effects.
7 pairs of the two DIGIC 4 + DIGIC 4 image processor, dual-digit achieve 8 / s DIGIC 4 pairs of high-speed continuous shooting of digital imaging processors to achieve through the eight-channel high-speed from the image sensor to read out, with about 18 million pixel a large information quickly and precision handling. Carrying two high-performance digital image processor, DIGIC 4, capable of a variety of data parallel processing, even an effective plan of about 18 million yuan can be achieved up to about 8 / s burst of high-speed image processing. Capture images of the analog-digital conversion are 14-bit (16384 colors) for, even if high-speed in-camera processing analog-digital conversion will not reduce the number of bits. EOS 7D is not only equipped with a dual DIGIC 4, and equipped with two newly developed to convert analog signals to digital signals, high-speed 4-channel analog-digital conversion front-end modules, and dual DIGIC 4 combinations of high-speed parallel processing circuits. Based on these technologies, not only to achieve high-speed processing of image data will be used ISO sensitivity up to 6400, and maintain low noise image effects. In addition the effect of automatic optimization of brightness is also further enhanced. The amount of light surrounding the lens correction, processing is completely able to adapt to primitive and shooting speeds are improved.If you use compatible with UDMA (Ultra Direct Memory Access) memory cards, then store the image data can also be high-speed. EOS 7D color style through Picture Style to achieve. In addition to the default camera 6 (Standard, Portrait, etc.), the Canon is also based on the user need to provide a 7 Picture Style Files (nostalgia, dawn and dusk, etc.), a total of 13 kinds of photo styles. Moreover, the user can also style on top of an existing photo to fine-tune handling. In addition, users can use the camera with the software Picture Style Editor, to produce their own original Picture Style file. Preset white balance can be carried out from 9 kinds of choices, and depending on the shooting of its intent to fine-tune. EOS 7D is the ability to plan for about 18 million yuan, up to about 8 / second continuous shooting speed, to conduct high-speed image processing of these complex models. Which is precisely to provide protection for these new dual DIGIC 4 Digital Image Processor.
7 pairs of the three central F2.8 + F5.6 8 to the double cross, all 19 points cross-type AF system for high-resolution digital SLR cameras, the ability to accurately capture the various scenarios of Pi Sheti high-performance auto-focus system is even more important. EOS 7D carrying as many as 19 of the automatic focus, and to increase the focus of each of the focus accuracy. 19 pairs of focus corresponding to F5.6 beam used in all cross-type AF sensors. Will be used to detect vertical lines of horizontal linear AF sensor used to detect horizontal lines with vertical linear AF sensor was cross-shaped arrangement, thereby achieving a high Pi Sheti capture capabilities. Central focus is on relative to F5.6-beam cross-type AF sensors, the direction of the ramp to configure the corresponding F2.8 beam more accurate cross-type AF sensors. Through the central 8 to the double cross AF sensors work together to achieve high-speed and high precision co-coke. Tracking Pishe Ti AI Servo AF feature on the EOS 7D also been a substantial evolution. Beishe Ti is not only a tracking camera and the distance, in the Pi Sheti relatively parallel to the camera for vertical or horizontal movement of the scenes, it is also able to automatically switch the focus to the track (19 points AF pm). Moreover, the focus will also be displayed automatically track the situation, so you can be assured through the viewfinder of the Pi Sheti track. In the EOS 7D, the automatic focus selection methods and systems have also been a substantial evolution. In the original manually select one point of the single-point auto-focus, based on the increase in the fixed-point auto-focus, automatically expand the focus.Fixed-Point Auto Focus AF range than single-point AF smaller, more precise co-coke. Automatic focus of expansion is that, when the Pi Sheti deviate from the manual of choice due to movement of the focus, it will automatically start the selected adjacent pairs of auto-focus focus focus to support. In addition, EOS 7D also has a regional auto-focus, which is the 19 auto-focus is divided into five regions of the user can select any one of focus from one area to focus. Not only that, can simultaneously use of all 19 AF points automatic select: 19 points Auto Focus, has also been strengthened. Whether in the aspects of the cameras high-definition or high-speed aspects of the implementation of appropriate countermeasures. It is the support of their newly developed AF sensor and the corresponding calculation engine. AF sensor unit in the optical auto-focus on the accuracy is enhanced. Structure using durable construction and materials. For the AF-related information processing, to take specific processor and the camera auto-focus with the central processing unit distributed processing approach, providing a fast and accurate auto-focus.