More on Amazon.com : http://www.amazon.com/gp/product/B002YS3EPY?tag=thefatkidin06-20 <br /> <br />Don Zeck Lens Cap for Canon 400mm f/2.8 USM IS or Canon 800mm f/5.6 USM IS Lenses <br /> <br />Finally a practical and effective lens cap to protect your front element from scratches dust rain and other hazards <br />This improved design features a handle to facilitate mounting or removing the lens cap while the lens hood is in the shooting position <br />The cap can be mounted on the lens while the hood is in the shooting position orin the stored position <br />The handle allows a firm grip on the cap so that it can be easily installed <br />The handle will compress for easy storage while your lens is in its case
