Protective Cap for Lenses and Slim Filters
Lens protective cap - also for slim filters
This lens cap protects lenses and filter lenses from dust, water and scratches. The lens cap slides over the lens or filter. Therefore it fits onto converters without threads and slim filters where common snap-on lens caps won't fit.
Inner diameter of the cap = outer diameter of the filter
The indication of size in the head of the article applies to the inner diameter of the lens cap. This complies with the outer diameter of the lens or filter. So before you buy this lens cap you should measure the outer diameter of your lens or filter. According to experience a 54mm lens cap fits on a lens with a 52mm filter thread and a 70mm lens cap on a lens with a 67mm filter thread.