Haida 72-77mm NanoPro Magnetic Step Up Ring HD46697277
Haida NanoPro Magnetic Step Up Rings come in three different sizes; 62-67mm, 72-77mm (this one) and 77-82mm
The magnetic step-up adapter ring is screwed onto the filter thread of the compatible lens, allowing you to magnetically connect the magnetic filter to it.
This magnetic step-up ring enables you to use magnetic filters on multiple lenses.
For example, purchase a 72-77mm magnetic step-up ring and 77mm magnetic filter, which can be used with both 77mm lens and 72mm lens.