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Canon 20Da (Astrophotography)
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384
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Wed January 21, 2009
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Description:
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"LAKE SUCCESS, N.Y., June 2, 2005—Now that Canon digital SLRs are proven performers on this planet, Canon U.S.A. Inc. is reaching for the stars with the much anticipated EOS 20Da digital SLR. Based on the popular EOS 20D camera and joining it as a companion model in Canon's product line, the new EOS 20Da digital SLR helps address the specific requirements of astrophotography with features such as a live preview LCD and a modified low-pass filter optimized to help photograph the clear night sky in brilliant detail. The EOS 20Da digital SLR will be available in July at an estimated selling price of $2199.*
The low-pass filter positioned in front of the EOS 20Da's 8.2-megapixel CMOS sensor has been modified from the EOS 20D to yield sharper and higher contrast images of various astronomical phenomena such as diffuse reddish nebulae. The modification increases the transmission of light at the specific wavelength of 656nm, known as the Hydrogen Alpha line, or Ha wavelength, by a factor of 2.5x compared to the standard EOS 20D digital SLR. Although optimized for astrophotography, the EOS 20Da can also be used for most conventional photography by mounting an optional filter on the lens in use.**
"The EOS 20Da digital SLR is a direct result of Canon addressing the specialized needs of the astrophotography market," said Yukiaki Hashimoto, senior vice president and general manager of the Consumer Imaging Group at Canon U.S.A., Inc., a subsidiary of Canon Inc. (NYSE:CAJ). "By offering the EOS 20Da, we hope to make it both easier and more cost effective for astronomy enthusiasts to photograph the heavens, as well as events here on earth."
While traditional digital SLRs lack a live preview due to the blocking of the image sensor by a reflex mirror and shutter, the EOS 20Da digital SLR addresses this issue by locking up the mirror and opening the shutter to display a magnified live view of the subject on the 1.8" LCD monitor. (This feature is effective for clear night viewing conditions only.) To help ensure a sharp focus, the central portion of the image can be magnified on the LCD by 5x (4% of the picture area) or 10x (1% of the picture area). The live view mode can also be viewed through most TV monitors while connected to the EOS 20Da camera's video OUT terminal.
Photographers can also attach the EOS 20Da digital SLR to a telescope through the use of widely available optional T-mounts. The EOS 20Da is also compatible with all Canon EF and EF-S lenses***, the world's largest selection of interchangeable autofocus lenses, including select image stabilized telephoto lenses.
The EOS 20Da digital SLR features enhanced noise reduction for long exposures, achieved by incorporating an optimized CMOS control system. A custom function is also available for noise reduction, so users can enjoy the wide array of ISO settings ranging from 50-3200.
The EOS 20Da retains the same features that have made the EOS 20D digital SLR a favorite among discerning photographers, such as Canon's own DIGIC II processor for low noise, high speed, and excellent image quality. Other features include a nine point autofocus system, full manual controls, up to five frames per second burst mode, and a choice between RAW, JPEG, and RAW+JPEG image recording capabilities. To reduce vibration at the start of the exposure, self-timer and mirror lock-up functions are integrated into the camera. The camera also features a backlit LCD display on top for easy adjustments of camera settings in the dark.
To support the needs of astrophotography, Canon provides a full line of EOS system accessories compatible with the EOS 20Da digital SLR. For better control over shutter release timing and to reduce vibration, Canon offers remote control solutions like Timer Remote Controller TC-80N3, as well as Remote Switch RS-80N3. When the camera is attached to a telescope, low angles make composing shots through the viewfinder difficult. Canon's response is the Angle Finder C**** which attaches to the camera's eyepiece. To increase battery life for even longer exposures, Battery Grip BG-E2 is available. It accepts two rechargeable Lithium-ion batteries or widely available AA-size batteries."- Canon USA Press website
Note: This is a camera with the IR (hot) filter removed, if you add a IR filter onto the front, then you will get IR images. It also was only available in Japan, so good luck finding one. It also had live view, now available on the Canon 40-50D and the 1Ds and 1D MK III.
Average price- $1200-1400.
Second Generation 8.2 Megapixel CMOS Sensor w/ DIGIC II Image Processor
Professional Level High-speed Continuous Shooting
9-Point High-precision AF with New Multi-controller
Enhanced Color and White Balance Settings
Rigid Magnesium Alloy Body for Outstanding Durability
Advanced Viewing and Printing, Powerful Software
Compatible with all EF/EF-S Lenses and Many EOS System Accessories
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Keywords:
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Canon 20D 20 D Astrophotography 20Da Da
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