KENKO 55mm Filter PX3 (Inventory No. 55-4)

This is a close-up lens. The focal length is 33cm, the same as No. 3.
When the camera lens's distance scale is set to infinity (∞), the focus will be at a distance of 33cm from the tip of the lens. Extending the helicoid will allow for focusing at closer distances.

As this is an old item, there are scratches and dirt.
Specifically, there is peeling of the coating on the inner side of the lens.
This will have little to no effect in direct light, but may cause flare in backlight.
Please do not purchase if you plan to shoot in backlight at close distances within 33cm.