Canon EOS Resources
Evaluative and Partial Metering
One of the many advantages of automation is to help one to make less mistakes and enabling higher yield of success in photography. Features found in any modern SLR ensure you can count on correct exposure in many difficult photographic situations such as in backlit scenes without even setting exposure compensation. Although not an entirely Canon pioneered technology (the Nikon FA of 1983 did ), both the Canon EOS 650 and 620 utilize the evaluative metering (or "Factor-Six Light Analysis") metering system to ensure one will get technically correct exposure on the main subject even in backlit situations without needing any exposure compensation to be applied.
The evaluative metering system is made available in all the EOS camera models, and has been the standard metering option since the EOS 650. Throughout the years, the evaluative metering system has seen a few evolutions, from the original 6-zone version used in the EOS 650/620/630 and EOS-1 to the 16-zone type utilized for the EOS 5 and EOS-1N/1N RS. Newer entry-level and some midrange EOS models introduced after 1998 featured the 35-zone version while both the EOS-3 and EOS-1v SLRs utilize the newer 21-zone pattern (which is also used in all the Digital EOS-1 series to date).
Photo: Alyssa Law Shiau Pyng is seen here waving to the audience after having been crowned as Miss Malaysia/Chinese International 2000. Image courtesy of Philip Chong
Basically, the system (FACTOR-SIX LIGHT ANALYSIS Evaluative Metering ) used in the 620 breaks the viewfinder image into six separate areas; light is measured in each area on an individual basis, and that information is then fed into the camera's computer for analysis,
The optimum exposure is set in accordance with the camera's exposure calculation methods based on thousands of actual photographic samples. The EOS 620 also has a partial metering mode that reads about 6.5% of the viewing screen area. This allows the photographer to emphasize one part of an image for absolute color or black and white control.
PARTIAL METERING Partial metering can be used to exaggerate the contrast between your subject and the rest of the scene, or to obtain correct subject exposure when you have a particularly light or dark background. It does this by restricting light measurement to that on your subject (about 6.5% of the viewfinder screen).
MAXIMUM 1/4000th of a Second Shutter Speed and built-in 3 fps (frames per second) Integrated Motor Drive
Canon SLRs has also been synonymous with sports and action photography. The EOS 650 has a rather conservative 1/2000sec maximum shutter speed and naturally, sometimes where the situation demands it, higher shutter speeds are the features you need to shoot both sports and action photography and the EOS 620 has one stop advantage with its 1/4000 sec., which is equivalent to the fastest non-AF based FD mount model, the Canon T90. Its top shutter speed of 1/4000 sec. allows this camera to be placed among the top performers in sports and action photography during that time. This will be the type of technical feature that your prospects-even serious amateurs will be on the lookout for.
The EOS 620 also incorporates a built-in motor drive with a top speed of three frames per second. Since the drive is integrated right into the camera body, it adds little weight and doesn't hinder handling and maneuverability.
In addition to the continuous mode, the motor drive offers a single frame mode for the convenience of automatic film advance. BUILT-IN THREE -FRAMES-PER-SECOND MOTOR DRIVE Motor drive is an invaluable feature for sports and action photography. Without it, you can be left behind when the action breaks without warning. That's why Canon gave the EOS 620 a built-in motor drive system. Unlike typical add-on units, this integrated system is exceptionally compact and lightweight-it won't load you down, so you can take maximum advantage of its three frames-per-second shooting speed when shooting continuous action photos.
CHOOSE FROM TWO DRIVE MODES There are two drive modes to choose from depending on your shooting needs. Single frame advances the film one frame at a time, while the continuous mode advances the film continuously at about three frames/sec. for shooting action sequences.
Credit: Images courtesy of Mr. Phoon of Phoon Foto, Ipoh ® <Microglobeuk@aol.com> where he also operates a popular website (URL:www.phoonfoto.com.my) trading new/used photo equipment. Image copyright © 2003. All rights reserved. Please respect the visual property of the contributing photographer.
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Canon Autofocus EF Lens Resources
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Technical Specifications of EOS 620
Main Reference Map of EOS 620
| Instruction Manual for EOS620/650 - External Link |
Additional information on other EOS AF-SLR Models:
EOS-650 (1987.2) | EOS-620 (1987.5) | EOS-750QD (1988.10) | EOS-850QD (1988.10) | EOS-630QD (1989.4) | EOS-1 (1989.9) | EOS-RT (1989.10) | EOS-700QD (1990.3) | EOS-10S QD (1990.3) | Canon T-60 | EOS-1000F /RebelS QD (1990.9) | EOS-100 / Elan QD (1991.9) | Canon EF-M (1991.9) | EOS-5/A2E QD (1992.10) | EOS-1000FN /Rebel S II QD (1992.4) | EOS-500 / Rebel XS / KISS (1993.10) | EOS-1n (1994.9) | EOS-888/5000QD (1995.1) | EOS-1n RS (1995.3) | EOS-50/50E / Elan II(E) /EOS 55 (1995.9) | EOS -500N / Rebel G / KISS II (1996.9) | EOS-IX (1996.10) / EOS-IX Lite /IX-7 (1996.3) | EOS-3 (1998.11) | EOS-88/3000 (1999.3) | EOS-300 / Rebel 2000 QD / KISS III (1999.4) | EOS-1v (2000.3) | EOS-30 / EOS-7 / EOS Elan 7E (2000.10) | EOS-3000N /EOS-66 / Rebel XS-N (2002.2) | EOS-300V / Rebel Ti / KISS V (2002.9) | EOS 3000V / Rebel K2 / KISS Lite (2003.9)
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