Adjustable Iris Aperture Diaphragm Adapter Ring

This is an adjustable iris aperture diaphragm adapter designed to connect lenses with different thread sizes. It features an M30 to M37 thread conversion, allowing for compatibility between lenses and optical modules. The diaphragm can be adjusted to control the amount of light passing through, with a range from 1.5mm to 26mm. Made from durable materials, it provides a secure fit and precise control over light exposure. Suitable for use with various optical systems requiring thread conversion and adjustable aperture control.