RLPhoto
Gear doesn't matter, Just a Matter of Convenience.
weixing said:Hi,RLPhoto said:Av lets the camera pick a shutter speed, which affects the ambient exposure when using flash. So, one instance you could have a coleminers cave @ 1/200 and the next frame it will be light trails @ 1/60 or even slower if you activate 2nd curtain sync. Av doesn't give consistency when using flash with changing ambient light. Its similar to using Av to shoot concerts with flutters in lighting conditions that will ruin the subject with underexposer + the use of flash on top of that.
The rules change alittle bit when using flash because now your exposing for ambient and one for the flash.
Shutter speed = Ambient control (that's why sync speed is so important to a flash photog)
ETTL or M controls on flash = Flash exposure.
Since shutter speed control ambient lighting, so if your ambient lighting change, you'll need to adjust your shutter speed to get the correct exposure, right? If that the case, in Av mode you need to set exposure comp if you think it's necessary, but in M mode, you had to set the shutter speed since the flash exposure cannot use to compensate the change of ambient lighting, right?
Have a nice day.
Lol. You really don't understand flash.
Consider this, lets say the correct exposure for the ambient light at a reception is ISO 400 - f/5.6 - 1/100th.
If I want to cut the ambient, I only move the shutter speed dial to 1/200th. Bam 1 stop less.
If I want to add ambient, I only move the shutter speed dial to 1/50th. Bam 1 stop more.
What is the difference between that and Av expo comp? I'm still only moving one dial? Why bother with Av for then! It's inconsistent but manual mode will be exactly the same even if the occasional bright light source came into the frame.
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