Lens foot for Sony FE 400mm f/2.8 GM and FE 600mm f/4.0 GM. The SF-03 is the more functional lens shoe for large E-Mount lenses from Sony. It is lighter, more compact, safer, and offers an expanded range of features. The integrated and secured Arca mount provides the lens (and camera) with a completely firm hold without twisting – even in portrait orientation. The lens foot also features 1/4" and 3/8" standard threads, as well as a Quick-Detach (QD) mount for Leofoto camera straps. The SF-03 is compatible with the following Sony lenses: FE 400mm f/2.8 GM and FE 600mm f/4.0 GM.