Height= 20mm
Inner Diameter= 76mm
Aperture = 51mm
Thickness = 2 mm

Canon 18-135mm Lens - Bahtinov Focus Mask for camera lens or telescope lens. Condition is New. Shipped with USPS First Class. Software Designed and tested. Works great with these and similar models. 3d printed and designed by Spencer 3d. As always fast USPS SHIPPING. 2 TO 3 DAY SHIPPING. White or black available. comes in black.