Male side: 40mm screw thread. Female side: 40.5mm screw thread. The 40mm-40.5mm adapter is a filter adapter for digital camera lenses that can connect 40mm filters to lenses with 40.5mm apertures.
This adapter has a male and female design, with a 40mm male end and a 40.5mm female end, which can help users easily switch between different apertures and use a wider range of filters or other lens accessories.
Its main purpose is to adapt filters of different specifications to solve the problem of not being able to use them due to mismatched lens and filter apertures. The adapter is very suitable for photography enthusiasts who want to use filters of different sizes, UV filters, polarizers and other accessories together.
Lightweight and easy to use: easy to carry and easy to install without additional tools.
Strong compatibility: Suitable for lenses and filters of various brands and models.