Kirk's custom machined Quick Release Lens Plate for the Canon 28-300mm f3.5-5.6L IS USM Ring collar C and Canon 70-300mm f4-5.6L IS USM
This lens plate was replaced by the new KLP-360,see here!
Expertly crafted from solid but lightweight 6061-T6 alloy aluminum
Features precisely contoured non-pivoting lip design
Two captive high strength stainless steel mounting screws
These features keep the plates from twisting and enhance rigidity
Anodized to a virtually unscratchable black satin finish
Using this plate, you'll find you can mount your equipment to your tripod head easier, faster and more securely, with much less risk of vibration or slipping.