IV. PERFORMANCE AND RELIABILITY | 31 |
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some cases, the largest face found in the scene and the camera focuses on that face (metering and color balance is also optimized to produce a more accurate facial tone based on the face in the box). The multi-controller then allows you to move the box to another face as desired, after which the AF and metering system will reset for that face.
E-TTL Flash photography is possible in normal Live View mode, but not when the Silent shutter mode is activated. Otherwise, when the shutter is pressed to capture the image when using the flash, the LCD blacks out as the mirror flips down and pre-flash exposure data is registered in the camera prior to exposure. The time delay is similar in length to that caused by pressing the AF Button in Live View mode. Flash photography is also supported when the EOS 5D Mark II is set to Live View Function, but it is disabled in HD video recording mode.
Precise 9-point AF Systems The AF systems on both the EOS 50D and EOS 5D Mark II are very similar to the systems on the models they replace, with the same improvements appearing in both new cameras. Among these are faster AF data processing made possible by the DIGIC 4 Image Processor, improved AF precision, and AF Microadjustment for individual lenses.
The EOS 50D features 9 cross-type AF points arranged in a diamond pattern, with all sensitive to both horizontal and vertical details when using f/5.6 or brighter EF and EF-S lenses. This sensitivity achieves faster, more precise focusing with hard-to-focus subjects, and enables high-speed (6.3fps) continuous shooting in the AI SERVO AF mode while tracking a subject.
EOS 50D AF Systems | | | |
Sensor Configuration | AF Points | AF Sensor Arrangement |
Cross-type sensor at f/2.8 | | |
Focusing sensor for | Two-line sensors | | Sensor with f/2.8 Support |
extreme defocus | in zigzag pattern | |
| | | Sensor with f/5.6 Support |
When using an f/2.8 or brighter maximum aperture lens, the central AF point offers enhanced cross-type sensitivity and faster detection of subjects in extreme defocus. This is achieved by adding diagonal sensors and a 2-line, zigzag configuration to the existing f/5.6 sensor already positioned in the center of the diamond.
