Great Lens cap for Canon 600 mm. Lens
YES, I just get your Don Zeck Lens Cap # 10 yesterday for my Canon EF 600 mm. F/ 4.0 L IS USM, and this cap is the most SMARTEST DESIGN and GREAT craftsmanship---Yes Follow Functions as the Old Master Said. Beautiful Craftsmanship, Light weight material and perfected Fit to my Lens. Yes the O rings are Very Smart Design, to fit the cap on the front of lens perfectly with out touch the high cost of glass. The Design + Craftsmanship of this Lens cap = A++ Surapon Sujjavanich, AIA, CPS.