Hello,
We have these push on caps which I do not think are ideal.
The
Kaiser 75mm Plastic Lens Cap is a push-on style cap. It is designed to fit any camera or enlarger lens, binocular, tele-, micro-, or spotting scope lens. To use one, measure the outside diameter of your lens barrel. Order the cap size that is 1 or 2 millimeters larger than the size measured. The cap should fit snuggly but not so tight that it is hard to remove.
Kaiser 74mm Plastic Lens Cap
The
OP/TECH USA Hood Hat, Mini is designed to fit a lens and shade with a diameter from approximately 3.0-3.5". Simply placing the Hood Hat onto the front of the hood while in place will provide just as much protection for the critical front lens elements as would be provided by a traditional lens cap. The neoprene material will adjust to fit both round and elliptical "petal-type" shades.
The
LensCoat X-Small Hoodie Lens Hood Cover is a neoprene hood cover that fits easily and snugly around your lens hood in either the shooting position or reversed. This can help to protect the front element of your lens from dirt, dust, moisture and impact. The Hoodie features a reinforced removable front element protection disc made from rigid plastic and firm foam to further protect your lens from damage.
Chuck