AE/FE Lock button for canon 500d, t1i
Sunday, August 9, 2009
AE/FE Lock(" * " button)
The Canon T1i has the simplified AE Lock button, which unbundles the AF Lock feature from the old button on the older EOS cameras like the 20D and 30D. Marked with an asterisk (*) symbol, the AE Lock button simply holds the exposure at one setting while you recompose the image. It's very useful when spot metering, but also when dealing with subjects where you want to draw your exposure from one place, while autofocusing on another. Pressing the button with the pop-up flash activated or with an external flash mounted activates the FE Lock (Flash Exposure) function, which fires the flash and locks the proper exposure for the following frame. (Note that this button's default function changes in Live View and Movie modes, where it triggers an AF cycle vs locking the exposure.)
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The Canon T1i has the simplified AE Lock button, which unbundles the AF Lock feature from the old button on the older EOS cameras like the 20D and 30D. Marked with an asterisk (*) symbol, the AE Lock button simply holds the exposure at one setting while you recompose the image. It's very useful when spot metering, but also when dealing with subjects where you want to draw your exposure from one place, while autofocusing on another. Pressing the button with the pop-up flash activated or with an external flash mounted activates the FE Lock (Flash Exposure) function, which fires the flash and locks the proper exposure for the following frame. (Note that this button's default function changes in Live View and Movie modes, where it triggers an AF cycle vs locking the exposure.)
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