Allows you to use larger size filters on lenses with a smaller diameter thread. The first number is the size that screws into the lense, the second number is the filter size.
Reviewed by 2 customers
Very useful allowing you to use existing filters to fit lenses with different thread sizes
I have a really nice rubber hood with a 55mm circumferance. This adapter helps me use it on my 50mm 1.8 AFD and now it looks like a classy piece of glass.