Canon has today announced that its specialized EOS 20Da, which was at first introduced as a Japan-only model, will now be available in the rest of the world. This camera is suited to astrophotography as well as infrared photography.
The EOS 20Da is identical to the EOS 20D except for a modification to the
low-pass filter, which now filters less infrared (IR). This camera is best suited to astrophotography as well as infrared
photography. It would be possible to use it as a normal camera but would require an external IR cut filter. In addition the
camera has a partially transmissive mirror, which enables live focusing on the LCD monitor (this can only be done for
short times and requires the mirror to be locked up). Pricing has not yet been announced.
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 Hα wavelength, by
a factor of 2.5x compared to the standard EOS 20D digital SLR.
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? 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 while connected to the
EOS 20Da camera?s video OUT terminal.
The EOS 20Da is compatible with all Canon EF and EF-S 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.
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.
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.
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.