Markins LC-60N Lens Foot for Canon Arca-Swiss Compatible The Markins LC-60N is a lens foot for Canon 400-800mm lenses. [Compatible Lenses] EF 400mm f/2.8L IS II USM EF 600mm f/4L IS II USM EF 800mm f/5.6L IS USM I used this with my RF 400 f/2.8L and RF 800 f/5.6L and it worked without any problems. There are no scratches or stains, and it is a beautiful item. I am selling it to organize my equipment.