LensCoat® Minolta AF 300 f4

The adhesive is strong enough that the cover hasn't shifted a millimeter after a full day of hiking with my camera swinging on the strap. Makes me less nervous about tossing the lens in my pack.

Three days of shooting in light drizzle and the neoprene cover still looked pristine, not a single scuff on the lens barrel underneath. The cutouts for the focus and aperture rings line up perfectly, so I never had to wrestle the thing off to adjust settings.

The neoprene shell wraps the lens tightly enough that I don't worry about it sliding around in my bag, and the extra padding saved me from a nasty scrape on a rock wall last weekend. My old 300 f4 looks almost new again, which is exactly what I wanted for resale down the line.