http://www.bhphotovideo.com/c/product/514614-REG/Kenko_KFM_1100_KFM_1100_Auto_Digi_Meter.html
But e-TTL2 or i-TTL was designed to do just exact what you want to do.
Best regards,
Alex
http://www.bhphotovideo.com/c/product/514614-REG/Kenko_KFM_1100_KFM_1100_Auto_Digi_Meter.html
But e-TTL2 or i-TTL was designed to do just exact what you want to do.
Best regards,
Alex