How the adapter ring works

The first value in the 72-58 mm designation refers to the lens or tube thread, while the second refers to the filter or accessory thread. Screw the ring into the 72 mm thread, then attach the 58 mm accessory to the ring.

Matching thread sizes

Before ordering, check the front-thread diameter on the lens and the thread diameter of the filter or converter. This version connects a lens-side thread of 72 mm to an accessory thread of 58 mm. Using a smaller-diameter filter can cause vignetting with some lenses and focal lengths, so compatibility should be checked for the intended setup.

Technical data

• Type: Step-down filter adapter ring
• Lens/tube-side thread: 72 mm
• Filter/accessory-side thread: 58 mm
• Model: 72-58 mm

Package includes:

• Genesis Gear Step-Down Ring 72-58 mm
• original packaging