CAMDEC Lens Cap for Nikon Ai-S NIKKOR 300mm f/2.8 ED

For the manual-focus Ai-S 300mm f/2.8 EDNikon stopped making accessories for this lens decades ago, so the front usually travels in a slip-on cover or a sock. This is a proper hard cap made for it.It clicks straight onto the front of the lens, no adapter ring and nothing to thread. Two stainless springs hold it, so it comes off with one hand and goes back the same way, gloves on. The raised anti-slip ring lets you rest the lens face down without it sliding.About the 3D printing. It is not hobby filament. It is fiberglass-reinforced engineering plastic, printed by us in the USA, with stainless steel screws and springs.Fits: Nikon Ai-S Nikkor 300mm f/2.8 ED