Canon EOS 20D

Infobox_Digicam
model = Canon EOS 20D


kind = Single-lens reflex
sensor = 22.5 mm × 15.0 mm CMOS
res = 3,520 × 2,344 (8.25 megapixels)
lens = Interchangeable (EF EF-S)
viewfinder = Optical
storage = CompactFlash (CF) (Type I or Type II) and Microdrive (MD) / max 8GB
shutter = Vertical travel, focal-plane shutter, all speeds electronically controlled
shutterRange = 1/8,000 to 30 s, bulb
metering = TTL full aperture, 35 area evaluative, partial, center-weighted
emode = Full auto, programmed, shutter-priority, aperture priority, manual
mmode = Evaluative, Partial, C/Wgt Average
farea = 9 autofocus points
fmode = One-shot, AI servo, AI Focus, Manual
cont = 5.0 frame/s, up to 23 frames (9 in RAW)
speedRange = 100–1600 in 1 EV steps, 3200 in extended mode
rearLCD = 1.8 in (46 mm), 118,000 pixels
flbkt = none
fcbkt = none
WB = 7 presets, Auto and custom
wbbkt = ±3 stops, blue-amber or magenta-green bias
flash = Auto pop-up E-TTL II (retractable)
dimensions = 144 x 105.5 x 71.5 mm
weight = 685 g (body only)
battery = Main battery Li-Ion BP-511A rechargeable battery pack; internal memory battery CR2016 supports clock, frame counter
obp = Li-Ion BP-511A, BP-511, BP-512, BP-514AC and optional DC coupler.The Canon EOS 20D is an 8.2-megapixel semi-professional digital single-lens reflex camera, initially announced on August 19 2004 at a recommended retail price of US$1,499. It is the successor of the EOS 10D, and was succeeded by the EOS 30D in August 2006. It accepts EF and EF-S lenses; it uses an APS-C sized image sensor.

Improvements

The 20D features a new sensor and more megapixels (8.2 megapixels instead of 6.3) and retains the 1.6 crop factor. It supports USB 2.0. The 20D has a larger buffer and can shoot more frames per second. It also has a new E-TTL II flash metering system and uses the new DIGIC II image processor,

The EOS 20D (with appropriate firmware updates) can also accept the Canon Wireless File Transmitter WFT-E1/E1A for fast file transfer to a remote file server, either through an ethernet cable or a Wi-Fi network.

Features

The 20D is the first Canon prosumer camera to use the EF-S lens mount; the first Canon EOS camera to use the mount was the 300D (the Digital Rebel in North America).

EOS 20Da

Canon released the EOS 20Da on February 14 2005 in Japan. It is a variant of the 20D designed for astrophotography. On June 1 2005, Canon announced that the 20Da would be made available world-wide. [http://www.dpreview.com/news/0506/05060101canon20da.asp] ]

One of the changes made to the 20Da over the 20D is the replacement of the "hot mirror" IR filter which covers the CMOS sensor on the 20D. [ [http://www.bobatkins.com/photography/digital/eos20da.html] ] In conventional photography, the IR filter is used to make the spectral response of the CMOS sensor more like that of the human eye. In this way, the pictures gathered by the sensor more closely resemble the world as we see it. In astrophotography, many objects of interest emit strongly in the so-called H-α line, which is heavily attenuated by the IR filter on the 20D. The IR filter of the 20Da passes 2.5 times as much light at around this 656 nm wavelength as does the filter of the 20D, allowing more fine detail to be revealed in long exposures of emission nebulae. A separate IR filter must be attached to the lens in order to use the 20Da to capture images similar to those seen by the human eye.

Firmware

The latest firmware available for the 20D (as of 8th April 2007) is version 2.0.3, made available 23 August 2005, which improves the communication reliability with some CF cards and other minor changes.

Gallery

References

External links

* [http://www.steves-digicams.com/2004_reviews/20d.html Steve's Digicams review of the 20D]
* [http://consumer.usa.canon.com/ir/controller?act=ModelTechSpecsAct&fcategoryid=139&modelid=10464 Canon EOS 20D Specifications]
* [http://www.dpreview.com/articles/canoneos20d/ DPReview reviews the 20D]
* [http://www.sns.ias.edu/~jns/wp/2006/02/12/a-list-of-canon-eos-5d-reviews-and-comparisons-with-the-canon-eos-20d/ Canon EOS 20D vs EOS 5D]
* [http://www.dpreview.com/gallery/?gallery=canoneos20d_preview/ Gallery of sample images] (includes links to raw camera output)
* [http://www.noendpress.com/pvachier/cameras/canon_EOS20D.php Canon 20D Review Links and Sample Photos]
* [http://www.eosrebels.com/cameras/20d.html EOSRebels.com: Canon 20D specs, reviews and sample images]