52mm-55mm Step-Up Metal Filter Converting Adapter Ring
(Lens (52mm) to Filter (55mm)) New SUNPAK
Very High Quality Made in Japan
Lens to Fit = 52mm ( Male Threads )
Filter to Fit = 55mm ( Female Threads )
This Stepping Ring enables a filter with an attachment (55mm Filter / Tube Adapter / Lens Hood / Lens Cap) size of 55mm to be used with a lens of 52mm.
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.
Still confused email us to clear it up further and also look at second picture that will help you understand.
We do combine S&H charges.