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#1
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Canon REBEL TI Flash Sync Speed Question
Hi,
I ended up getting the Rebel TI kit obviously. But i was wondering about using the built-in flash. In the "P" mode, you can see how the shutter speed is always set to the sync speed, which is 1/90 for the Rebel TI. However, the aperture always stays the same, because it is automatically set by the TTL exposure program, or something like that. In the "Tv" or "Av" modes, whether or not the flash is popped out or not, the exposure reading (flashing numbers mean under or over exposure) never seems to change. The only thing which will certainly happen when you pop the flash up, is that the shutter speed will be set to 1/90 if it was anything faster... If the shutter speed is slower than 1/90, then the EXPOSURE SETTINGS STAY THE SAME IN "Tv" or "Av". Why is this? I understand why the shutter speed must be 1/90 or slower, but why doesn't the "Tv" mode, for example, select a smaller aperture automatically when i pop up the flash? To compensate for the extra light from the flash? I'm pretty certain there is nothing wrong with my camera, but i just wanted to be sure. Any information greatly appreciated in advance. Slick |
#2
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Canon REBEL TI Flash Sync Speed Question
Hi,
I ended up getting the Rebel TI kit obviously. But i was wondering about using the built-in flash. In the "P" mode, you can see how the shutter speed is always set to the sync speed, which is 1/90 for the Rebel TI. However, the aperture always stays the same, because it is automatically set by the TTL exposure program, or something like that. In the "Tv" or "Av" modes, whether or not the flash is popped out or not, the exposure reading (flashing numbers mean under or over exposure) never seems to change. The only thing which will certainly happen when you pop the flash up, is that the shutter speed will be set to 1/90 if it was anything faster... If the shutter speed is slower than 1/90, then the EXPOSURE SETTINGS STAY THE SAME IN "Tv" or "Av". Why is this? I understand why the shutter speed must be 1/90 or slower, but why doesn't the "Tv" mode, for example, select a smaller aperture automatically when i pop up the flash? To compensate for the extra light from the flash? I'm pretty certain there is nothing wrong with my camera, but i just wanted to be sure. Any information greatly appreciated in advance. Slick |
#3
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Canon REBEL TI Flash Sync Speed Question
Hi,
I ended up getting the Rebel TI kit obviously. But i was wondering about using the built-in flash. In the "P" mode, you can see how the shutter speed is always set to the sync speed, which is 1/90 for the Rebel TI. However, the aperture always stays the same, because it is automatically set by the TTL exposure program, or something like that. In the "Tv" or "Av" modes, whether or not the flash is popped out or not, the exposure reading (flashing numbers mean under or over exposure) never seems to change. The only thing which will certainly happen when you pop the flash up, is that the shutter speed will be set to 1/90 if it was anything faster... If the shutter speed is slower than 1/90, then the EXPOSURE SETTINGS STAY THE SAME IN "Tv" or "Av". Why is this? I understand why the shutter speed must be 1/90 or slower, but why doesn't the "Tv" mode, for example, select a smaller aperture automatically when i pop up the flash? To compensate for the extra light from the flash? I'm pretty certain there is nothing wrong with my camera, but i just wanted to be sure. Any information greatly appreciated in advance. Slick |
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