Excerpt: I purchased the Lowepro Lens Case 5 to protect and transport my Canon EF 300mm f/2.8 L IS Lens with the hood reversed. Unfortunately, it did not fit - the case was very slightly too small. The Lens Case 5 will fit a lens up to but not quite this large. With extra padding, an extra-rigid base and compression straps, the Lens Case 5 will protect your large lens investment . Water-resistant 600D TXP™ outer fabric provides protection from wear.