Canon Speedlite 90EX Instruction Manual - Page 24
Flash Ratio with E-TTL II
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Flash Ratio with E-TTL II You can use two slave units together and perform E-TTL II autoflash shooting while changing the flash ratio. This is described using two slave units. B A 22
22
You can use two slave units together and perform E-TTL II autoflash shooting while
changing the flash ratio.
This is described using two slave units.
Flash Ratio with E-TTL II
A
B