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Canon EOS 20Da EOS 20Da digital SLR optimised for astrophotography. 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 specifically addresses the needs of astrophotography with features such as a live preview on the LCD monitor and a modified low-pass filter optimised for photographing the night sky in brilliant detail .
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FEATURES
Large CMOS sensor with effective 8.2-megapixel resolution
The large APS-C (22.5 x 15.0mm) 8.2 megapixel CMOS sensor with square (6.4 x 6.4µm) imaging elements enables high-quality reproduction of starry skies. This is the same renowned sensor featured on the EOS 20D and delivers the same bold, brilliant image quality. Its optimized photodiodes, together with an advanced imaging processor, realize exceptional image quality throughout the extensive ISO speed range of 100 to 1600 (plus ISO 3200 in extended mode). Moreover, Canon's proprietary color filter and on-chip microlenses ensure highly efficient light convergence.
The 3:2 aspect ratio of the CMOS sensor is the same as for conventional 35mm film cameras*, allowing experienced photographers to simply follow their instincts when framing images instead of concerning themselves with the differences of digital cameras.
* 35mm-equivalent focal length is approx.1.6 times the focal length indicated on the EF lens.
Hydrogen-alpha light sensitivity optimized for astrophotography
Optical characteristics of the EOS 20Da have been optimized for astrophotography. The new infrared filter in the low-pass filter, for example, is comprised of three liquid crystal layers with different optical axes and features approximately 2.5 times higher hydrogen-alpha light sensitivity than in the EOS 20D. Reddish diffuse nebulae are clearly captured as a result without the use of additional filters.
* The wavelength of hydrogen-alpha light is 656nm (656/1,000,000,000m).
Low noise even with long exposures at high ISO settings
Canon's second-generation on-chip noise reduction circuit lessens random noise and eliminates fixed pattern noise, resulting in images that are remarkably clear even when shooting at high ISO speeds. An optimized CMOS control system further reduces noise during long exposures.
Live View simplifies focusing via LCD monitor
 Conventional SLR cameras, whether digital or film-based, feature a quick-return mirror that temporarily renders the viewfinder blank when the shutter is released. The EOS 20Da, however, can lock the mirror to continuously display the live image on the built-in LCD monitor at the user's choice of 5x or 10x LCD magnification.
This unique Live View mode helps achieve accurate manual focusing more easily than with conventional SLR viewfinders.
High-speed DIGIC II imaging engine delivers highly accurate color
 Canon's DIGIC II imaging engine, acclaimed for its natural color reproduction, now offers more accurate color reproduction of bright, highly saturated images. Areas of high contrast are accurately reproduced and an extended dynamic range ensures smooth gradations throughout the image, from highlights to shadows. Power consumption is also reduced in this high-speed imaging engine.
Fully compatible with all EF lenses and various EOS accessories
Lens quality is critical in astrophotography, since even subtle lens aberrations can cause uneven distribution and distortion of light when shooting small points at infinite distances. Fortunately, EOS 20Da users can take advantage of Canon's professional lineup of over 50 EF lenses*. The L (Luxury) lens series, in particular, offers supremely refined optics highly recommended for astrophotography. This series exhibits exceptional fidelity, operational ease and environmental resistance due to finely ground aspheric lenses and special optical materials such as fluorite.
 Astrophotographers can also benefit from various EOS accessories such as Timer Remote Controller TC-80N3**, which allows the setting of exposure time, Angle Finder C** for shooting skies from a low camera position, and Battery Grip BG-E2**, which supports large-capacity batteries designed for the EOS 20D.
* Focus cannot be adjusted manually in Live View mode when using the following lenses, which employ electronic manual focusing:
EF50mm f/1.0L USM, EF85mm f/1.2L USM, EF200mm f/1.8L USM,
EF300mm f/2.8L USM, EF400mm f/2.8L USM, EF400mm f/2.8L ll USM,
EF500mm f/4.5L USM, EF600mm f/4L USM, EF1200mm f/5.6L USM,
EF28-80mm f/2.8-4L USM
Software
EOS 20Da is supplied with Canon EOS Solution Disk 9.1, containing EOS Viewer Utility 1.2, EOS Capture v1.2 and PhotoStitch 3.1. Canon Digital Photo Professional v1.6 and Adobe Photoshop Elements 2.0 is included to allow comprehensive image manipulation when needed.
EOS Capture v1.2 is a remote capture and control application for when the camera is tethered to a computer. It provides automated sequential control of the shutter release and download of images to the computer. The EOS 20Da is supplied with the AC adapter kit ACK-E2 as standard to allow the camera to be operated for long periods on AC power.
Digital Photo Professional v1.6 provides high-speed processing of lossless RAW images, and allows real-time display and immediate application of adjustments to images. The software includes a wide array of RAW, TIFF or JPEG image editing functions, which give control over variables such as white balance, dynamic range, exposure compensation and colour tone. The camera JPEG images can be recorded in sRGB or Adobe RGB colour space, and the Digital Photo Professional application supports sRGB, Adobe RGB and Wide Gamut RGB colour spaces. An ICC (International Colour Consortium) profile attaches automatically to RAW images converted to TIFF or JPEG images. This allows faithful reproduction of colours in software applications that support ICC profiles, such as Adobe Photoshop. Image processing of various parameter changes can now be batched rather than carried out sequentially, vastly increasing the efficiency when applying a number of changes to the same images.
The EOS 20Da includes membership of Canon's online photo album, CANON iMAGE GATEWAY with 100MB of space for image uploads and photo sharing.
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PICTURES 
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SPECIFICATION
| Body material |
Magnesium alloy |
| Sensor |
22.5 x 15.0 mm CMOS sensor
RGB Color Filter Array
Built-in fixed low-pass filter with revised IR cut filter
8.5 million total pixels
8.2 million effective pixels
3:2 aspect ratio |
| Image processor |
DIGIC II |
| Image sizes |
3504 x 2336 (8.2 MP)
2544 x 1696 (4.3 MP)
1728 x 1152 (2.0 MP) |
| File formats |
RAW
JPEG (EXIF 2.21) - Fine / Normal
RAW + JPEG (separate files) |
| Color space |
sRGB
Adobe RGB |
| Lenses |
Canon EF / EF-S lens mount
1.6x field of view crop |
| Focusing |
9-point TTL
CMOS sensor
AF working range: -0.5 - 18 EV (at 20°C, ISO 100) |
| Focus modes |
AI Focus AF
One shot AF
AI Servo AF
Manual focus |
| AF point selection |
Auto
Manual
Home position |
| AF assist |
Stroboscopic flash
4.0 m range (at center) |
| Metering |
TTL 35 zone SPC
Metering range: EV 1.0 - 20 EV (at 20°C, ISO 100, 50 mm F1.4) |
| Metering modes |
Evaluative 35 zone
Partial (9% at center)
Center-weighted average
Metering range: 1 - 20 EV (at 20°C, ISO 100) |
| AE lock |
Auto: One Shot AF with evaluative metering
Manual: AE lock button |
| AE bracketing |
+/- 2.0 EV
0.3 or 0.5 EV increments |
| Exposure compen. |
+/-2.0 EV
0.3 or 0.5 EV increments |
| Sensitivity |
Auto (100, 200 or 400)
ISO 100
ISO 200
ISO 400
ISO 800
ISO 1600
ISO 3200 (Enhanced H) |
| Shutter |
Focal-plane shutter
30 - 1/8000 sec
0.3 or 0.5 EV increments
Flash X-Sync: 1/250 sec
Bulb |
| Aperture values |
F1.0 - F91
0.3 or 0.5 EV increments
Actual aperture range depends on lens used |
| White balance |
Auto (3000 - 7000 K)
Daylight (5200 K)
Shade (7000 K)
Cloudy (6000 K)
Tungsten (3200 K)
Fluorescent (4000 K)
Flash (6000 K)
Custom (2000 - 10000 K)
Kelvin (2800 - 10000 K in 100 K steps) |
| WB bracketing |
+/-3 levels
3 images
blue/amber or magenta/green bias |
| WB shift |
Blue (-9) To Amber (+9)
Magenta (-9) to Green (+9) |
| Processing params |
Parameter 1 (con +1, shp +1, sat +1, tone 0)
Parameter 2 (con 0, shp 0, sat 0, tone 0)
Set 1 (con, shp, sat, tone)
Set 2 (con, shp, sat, tone)
Set 3 (con, shp, sat, tone)
B&W (con, shp, filter, toning) |
Custom params
(Set 1 - 3) |
Contrast (+/-2)
Sharpness (+/-2)
Saturation (+/-2)
Color tone (+/-2) |
| Viewfinder |
Eye-level pentaprism
95% frame coverage
Magnification: 0.9x (-1 diopter with 50 mm lens at infinity)
Eyepoint: 20 mm
Dioptric adjustment: -3.0 to +1.0 diopter
Precision matte screen |
| Viewfinder info |
AF points
Focus confirmation light
Shutter speed
Aperture
Manual exposure
AE Lock
Exposure compensation amount
AEB level
Partial metering area
Flash ready
Red-eye reduction lamp on
High-speed sync
FE Lock
Flash compensation amount
Warnings
Maximum burst for continuous shooting
Buffer space |
| LCD monitor |
1.8" TFT LCD
118,000 pixels
5 brightness levels
10x zoom playback
Coverage 100% (for JPEG images), centre 1% or 4% for Live View |
| Record review |
Off
On (histogram via INFO button)
2 / 4 / 8 sec / Hold |
| Flash |
Auto pop-up E-TTL II auto flash
FOV coverage up to 17 mm (27 mm equiv.)
Guide number approx 13
Flash compensation +/-2.0 EV in 0.3 or 0.5 EV increments
X-Sync: 1/250 sec |
| External flash |
E-TTL II auto flash with EX-series Speedlites
Wireless multi-flash support
PC Sync |
| Shooting modes |
Auto
Program AE (P)
Shutter priority AE (Tv)
Aperture priority AE (Av)
Manual (M)
Auto depth-of-field
Portrait
Landscape
Close-up
Sports
Night portrait
Flash off |
| Drive modes |
Single
Continuous: 5 fps up to 23 frames
Self-timer: 10 secs |
| Direct printing |
Canon Card Photo Printers
Canon Bubble Jet Printers with direct print function
PictBridge |
| Other features |
Orientation sensor
Automatically writes FAT16/FAT32 depending on capacity
LCD panel illumination |
| Auto rotation |
On (playback uses orientation data in file header)
Off |
| Playback mode |
Single image
Single image with info (inc. histogram)
Magnified view (1.5 - 10x in 15 steps, browsable)
9 image index
Auto play
Image rotation
Jump |
| Custom functions |
18 custom functions with 50 settings |
| Menu languages |
English
French
German
Spanish
Italian
Dutch
Swedish
Norwegian
Danish
Finnish
Chinese
Japanese |
| Firmware |
User upgradable |
| Portrait grip |
Via BP-E2 battery grip (option) |
| Connectivity |
USB 2.0 Hi-Speed
Video out
N3 type wired remote control
PC Sync flash terminal |
| Storage |
Compact Flash Type I or II
Microdrive supported
FAT 12/16 and FAT 32 support
No CF card supplied |
| Power |
Lithium-Ion BP-511A rechargeable battery (supplied & charger)
Supports BP-511 / BP-511A / BP-512 / BP-514
CR2016 Lithium battery (date/time backup)
Optional AC adapter |
| Dimensions |
144 x 106 x 72 mm (5.6 x 4.2 x 2.8 in) |
| Weight (no batt) |
685 g (1.5 lb) |
| Weight (inc. batt) |
770 g (1.7 lb) |
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