Midwest Optical LP1850-55

Midwest Optical SU46-55, Step-Up Ring, from M46 x 0.75 To M55 x 0.75, 57 mm Outer Diameter, 43.5 mm Clear Aperture

Midwest Optical SD58-55, Step-Down Ring, from M58 x 0.75 To M55 x 0.75, 60 mm Outer Diameter, 54.3 mm Clear Aperture

Midwest Optical SD62-55, Step-Down Ring, from M62 x 0.75 To M55 x 0.75, 64 mm Outer Diameter, 54.3 mm Clear Aperture

Midwest Optical SD67-55, Step-Down Ring, from M67 x 0.75 To M55 x 0.75, 68.7 mm Outer Diameter, 54.3 mm Clear Aperture

Midwest Optical SD72-55, Step-Down Ring, from M72 x 0.75 To M55 x 0.75, 75 mm Outer Diameter, 54.3 mm Clear Aperture