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G |
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| When the light source enters the lens directly, internal reflections by the lens surfaces can cause round, whitish spots on the image. This can be prevented by using a lens hood or hand to block out the light source. |
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| An indicator of a flash unit's output power. At ISO 100, you can calculate the maximum flash range by dividing the Guide No. by the f-number. For example, if the Guide No. is 10 and f/2 is set, the maximum flash range will be 5 meters. The Guide No. is also used to indicate the flash unit's maximum flash output. |
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H |
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| The abbreviation for High Definition (high-resolution pictures). High-Definition TV broadcast is one type of HD movie. The aspect ratio is 16:9. The Canon Digital SLR Cameras offer a number of HD movie recording sizes. For example, Full HD (Full High-Definition 1920x1080), HD (High-Definition 1280x720), SD (Standard 640x480) and so on. |
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| A connection interface that is standard to play back HD movie shot with Digital SLR cameras on an HD television set. HDMI stands for High-Definition Multimedia Interface. A single cable is capable of digitally transmitting movie, sound and control signals. |
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highlight detail loss/shadow detail loss |
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| This occurs when the image is overexposed and there are highlight areas with no detail, or when the image is underexposed and the shadow areas have no detail. |
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| A graph that shows how many pixels there are for each level of brightness. The horizontal axis represents the brightness, and the left end is the pixels for the totally black areas. The right end is the totally white areas. The vertical axis shows the number of pixels that exist for each brightness level. The image's histogram can be viewed on the camera's LCD monitor as part of the shooting data. The histogram indicates the brightness of the image. If there are more pixels on the left side of the graph, it means the image is dark. And if there are more pixels on the right side, the image is too bright. |
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| This is attached to the front of the lens to block out stray light entering the lens from outside the angle of view. |
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