introduced July 2005

• Modified low-pass filter optimised for night sky photography
• live preview on the LCD monitor or television monitor
• 5x and 10x magnification of live preview for accurate focusing
• enhanced noise reduction for long exposures
• mirror lock-up function
• backlit LCD display for making adjustments in the dark
• other features similar to those of the EOS 20D

Based on the EOS 20D, the 20Da is a digital SLR optimised for astrophotography.

The EOS 20Da will be available from mid-July 2005 for 1,829. 99 RRP inc. VAT (€2,549.99 RRP inc. VAT.)

As a specialised product, the EOS 20Da is only available to order from selected dealers; each country has a number of specialist dealers that can take orders for this camera. These dealers will have the opportunity to place orders for a limited time only. A list of selected UK dealers will be posted here as shortly. Photographers in other countries should contact their local Canon distributor for information.

Image sensor
Type: 22.5 x 15.0mm CMOS
Effective pixels: approx. 8.20M
Total pixels: approx. 8.50M
Aspect ratio: 3:2
Low-pass filter: built-in/fixed with revised IR cut filter
Colour filter type: primary colour

Image processor

Lens mount: EF/EF-S
35mm field-of-view factor: 1.6x

Type: TTL-CT-SIR with a CMOS sensor
AF points: 9
AF working range: EV -0.5-18 (at 20 degrees C, ISO 100)
AF modes: One Shot, AI Servo, AI Focus
AF point selection: automatic, manual
AF point display: superimposed in viewfinder and indicated on top LCD panel
Predictive AF: yes
AF lock: when shutter button is pressed half way in one-shot AF mode
AF assist beam: intermittent firing of built-in flash
Manual focus: selected on lens

Exposure control
Metering: TTL full aperture metering with 35-zone SPC
Modes: 35-point Evaluative (linked to all AF points); partial (approx. 9% of viewfinder); center weighted
Metering range: EV 1-20 (at 20 degrees C, with 50mm f/1.4 lens, ISO 100)
AE Lock: auto (operates in one-shot AF mode with evaluative metering when focus is achieved); manual (works independently at all times in creative zone modes)
Exposure compensation: +/- 2 stops in 1/2 or 1/3-stop increments
Autoexposure bracketing (AEB): +/- 2 stops in 1/2 or 1/3-stop increments
ISO speed equivalents: auto (100, 200, 400); manual (100, 200, 400, 800, 1600, expanded to 3200)

Type: electronically-controlled focal-plane shutter
Speeds: 30 seconds to1/8000 sec, bulb
Shutter release: soft touch electromagnetic release

White balance
Settings: auto white balance (AWB), daylight, shade, cloudy, tungsten, fluorescent, flash, custom, colour temperature setting, personal white balance
WB Bracketing: +/-3 stops in full stop increments; three bracketed images per shutter release; selectable blue/amber bias or magenta/ green bias

Colour matrix
Types: sRGB; Adobe RGB.

Type: Pentaprism
Coverage: approx. 95% vertical and horizontal
Magnification: 0.9x (with 50mm lens at infinity, -1 dioptre)
Eyepoint: 20mm
Dioptre correction: -3 to +1 dioptre
Focusing screen: fixed
Mirror: quick-return half mirror (transmission:reflection ratio of 40:60)
Viewfinder Information: AF Points, AE/FE lock, AEB, shutter speed, aperture, exposure level/compensation, maximum burst, AF/ MF focus confirmation, CF warning
Depth-of-field preview: yes
Eyepiece shutter: yes

LCD monitor
Type: 1.8 inch TFT, approx. 118,000 pixel, with live view mode
Coverage: approx. 100% (for JPEG images); centre 1% or 4% of sensor when viewing in live view mode
Brightness: adjustable (five levels)

Modes: auto, manual flash on/off, red-eye reduction
Hot-shoe: yes
PC terminal: yes
X-synchronisation: 1/250sec
Red-eye reduction: yes
Flash exposure compensation: +/- 2 stops in 1/2 or 1/3-stop increments
Flash exposure bracketing: yes
Flash exposure lock: yes
Second curtain synchronisation: Yes
Built-in flash coverage: to 17mm focal length
Built-in flash guide number: 13 (ISO 100, meters)
External Flash: E-TTL II with EX series Speedlites

Modes: full auto, portrait, landscape, close-up, sports, night portrait, no flash, shutter priority AE, aperture priority AE, manual, A-DEP
Photo effects: Monochrome mode (selected from the shooting menu) with options for filters and toning effects
Drive modes: single/continuous; continuous shooting speed 5fps (maintained for up to 23 JPEG images, depending on card speed and capacity)

Recording pixels/compression
Image sizes: Large/Fine 3504x2336, Large/Normal 3504x2336, Medium/Fine 2544x1696, Meium/Normal 2544x1696, Small/Fine 1728x1152, Small/Normal 1728x1152, RAW 3504x2336
Compression: Fine, Normal, RAW

File formats
Still image format: JPEG (Exif 2.21 [Exif Print] compliant)/Design rule for Camera File system: RAW & JPEG simultaneous recording: Digital Print Order Format version 1.1 compliant
Folders file numbering: consecutive numbering; auto reset
Processing parameters: standard parameters plus up to three custom processing parameters can be set

Direct print
Canon printers: Canon compact photo printers and Pixma printers supporting PictBridge

Other features
Custom functions: 18 custom functions with 50 settings
Personal functions: no
LCD panel (EL) illumination: yes
Water/dust resistance: no
Sound memo: no
Intelligent orientation sensor: yes
Histogram: yes
Playback zoom: 2x to 10x
Display formats: single image with information; single image; 9-image index
Image erase protection: protection of one image at a time
Image erase: single image; all
Self-timer: approx. 10 seconds
Menu categories: shooting menu; playback menu; setup menu
Menu languages: English, German, French, Dutch, Danish, Finnish, Italian, Norwegian, Swedish, Spanish, Simplified Chinese, Japanese
Firmware Update: possible by the user

Computer: USB 2.0 Hi-Speed (Mini-B)
Other: video output (PAL/ NTSC)

Memory card
Type: CompactFlash Type I / II (Microdrive compatible); compatible with all memory card capacities, including cards of 2GB and more

Supported operating systems
PC: Windows 98 (including SE), 2000, Me, XP
Macintosh: OS 9.0 to 9.2, OS X v10.1 to v10.3

Browsing and printing: EOS Viewer Utility
Other: PhotoStitch, EOS capture
Drivers: TWAIN (Windows 98 / 2000), WIA (Windows Me)
Image Manipulation: Photoshop Elements v2; Digital Photo Professional

Power source
Batteries: rechargeable Li-ion Battery BP-511/BP-511A or BP-512/BP-514 (BP-511A battery supplied)
Battery life: approx. 700 exposures at 20 degrees C or 550 (exposures at 0 degrees C (based on CPA standard using batteries and memory card supplied with the camera)
Battery check: automatic
Power saving: power turns off after 1, 2, 4, 8, 15 or 30 mins (selectable)
AC power supply: Power Adapter AC-EK2 (included)

Case: Semi-Hard case EH-17L
Lenses: all EF and EF-S mount lenses
Flash: Canon EX Speedlites (220EX, 380EX, 420EX, 550EX, 580EX, Macro-Ring-Lite MR-14EX, Macro Twin Lite MT-24EX, Speedlite Transmitter ST-E2)
Battery grip: BG-E2
Remote controller/switch: Remote control with N3 type contact
Power supply and battery chargers: AC Adapter Kit ACK-E2; Compact Power Adapter CA-PS400; Battery charger CB-5L; Battery charger CG-570; Car Battery Cable Kit CR-560; BP-511

Physical specifications
Body materials: magnesium alloy; plastic
Operating environment: 0 to 40 degrees C; 85% or less humidity
Dimensions (WxHxD): 144 x 105.5 x 71.5mm
Weight (body only): approx. 685g

Unfortunately we don't have an information section for this product. However, our website is being constantly updated so please check back soon.

20 June 2005

Canon has announced the EOS 20Da – a 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.

The low-pass filter positioned in front of the EOS 20Da’s 8.2 megapixel CMOS sensor has been modified 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 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.

“The EOS 20Da digital SLR is a direct result of Canon addressing the specialised needs of the astrophotography market,” said Mogens Jensen, Head of Canon Consumer Imaging Europe. “As an affordable digital alternative to their familiar film bodies, the EOS 20D offered semi-professional and serious amateur photographers digital photographic freedom. Now with the EOS 20Da, we also offer astronomy enthusiasts a new photographic opportunity, by providing an easier and more cost effective way to photograph the heavens.”

Enhanced features

While traditional digital SLRs lack a live preview on the LCD monitor due to the reflex mirror and shutter, the EOS 20Da digital SLR resolves this issue by locking up the mirror and opening the shutter to display a magnified live view of the subject on the 1.8 inch LCD monitor. (This feature is effective for night viewing conditions only. It cannot be used in bright light.) To 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 a TV monitor connected to the EOS 20Da camera’s video OUT terminal.

The EOS 20Da is compatible with all Canon EF and EF-S lenses – the world’s largest selection of interchangeable autofocus lenses – including select image stabilised telephoto lenses. Photographers can also attach the EOS 20Da digital SLR to a telescope through the use of widely available T-mounts.

The EOS 20Da digital SLR features enhanced noise reduction for long exposures, achieved by incorporating an optimised CMOS control system. A custom function is also available for noise reduction, so users can enjoy the wide array of ISO settings ranging from 100-3200.

The EOS 20Da retains the same features that have made the EOS 20D a favourite among discerning photographers, such as Canon’s DIGIC II processor for low noise, high speed operation, and excellent image quality. Other features include an intelligent nine point autofocus system, full manual controls, five frames per second burst mode, and 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 setting adjustments in the dark.


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.

Astrophotography accessories

To support the needs of astrophotography, Canon provides a full line of EOS system accessories compatible with the EOS 20Da digital SLR. For control over shutter release timing and to reduce vibration, Canon offers remote control solutions such as the Timer Remote Controller TC-80N3 and Remote Switch RS-80N3.

When the camera is attached to a telescope, low angles can make composing shots through the viewfinder difficult – Canon’s Angle Finder C attaches to the camera’s eyepiece allowing adjustment of the viewing angle while providing a 2.5x magnification.

To increase battery life for even longer exposures, the optional Battery Grip BG-E2 uses two powerful Lithium-Ion battery packs. It can also be used with six AA batteries in the supplied BM-E2 battery magazine.

The EOS 20Da will be available from mid-July 2005 for 1,829. 99 RRP inc. VAT/ €2,549.99 RRP inc. VAT.


As a specialised product, the EOS 20Da is only available to order from selected dealers; each country has a number of specialist dealers that can take orders for this camera. These dealers will have the opportunity to place orders for a limited time only. Local Canon sales companies can be contacted for the country dealer list.

key features

EOS 20Da

press release

EOS 20Da





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