Just bought a NN5L and want to use my 24-70 canon lens on the 5D, does someone know what would be the top arm measurements used for say 24 mm / 50 mm and 70 mm as I have read these measurements would not be the same that is use for say a 50mm lens focal length 50mm or say a 17-40 mm lens focal length set at 40 mm

thanks in advance.