The ring adapter easily screws onto the front of any lens, and converts the thread size of your lens to the thread size of any other accessory (such as filters, hoods, flashes and lens converters).
Made of high quality aviation aluminum alloy.
Extremely solid and lightweight.Specifically designed for your camera for a tight and secure fit.
No wobbling or cross
-threading.
The first number is always the lens thread size, the second number is the filter size of the accessory.
If the first number is bigger, it's a step
-down ring. If the first number is smaller, it's a step
-up.