This lens cap is for optical instrument (eg. binoculars, telescopes and spotting scopes) and accessories (eg. eyepieces, Barlow lenses).
Internal Diameter: 47mm (Note: the size is measured as internal diameter of the cap, which is equivalent to the external diameter of the lens including the lens housing).
Depth: 13mm
Material: plastic.
Note:
This listing is for ONE lens cap as described above (not for a pair).
These plastic caps are quite rigid so please measure your lens including housing to make sure it's external diameter is 47mm. If the cap is a little too big for the hood, you can consider lining the inner rim of the cap with some tape or foam to make it stay on better.
Note: The size of the lens cap is measured as Internal Diameter of the cap, which is equivalent to the external diameter of the lens including lens housing (as shown in the picture above).
If a cap is slightly bigger than the external diameter of the lens housing and there is no matched cap size available for the lens, you may consider putting an adhesive cloth tape around the internal edge/rim of the cap. This can often secure the cap on the lens.
