I primarily use the 24-70/2.8 and pair it with either the 16-36/2.8 or the 70-200/2.8 depending on the spread of the wedding layout. But low light lenses aren't really needed for outside weddings in Australia, unless it's heading into twilight. I primarily use the 24-70 and stay low, near the front. However, I could see advantages in moving back down the aisle further and shooting more with a different focal length. I was particularly considering the new 24-105/4, and wondered whether anyone was using this lens for weddings, or if photographers have found any other focal length particularly useful for outdoor weddings. Thanks!