"With this seamless gear ring, you can add a 0.8 meter long gear ring to photographic lenses to enable the use of cinema follow focus. Compatible rings can be found in our support section."
"This set includes a 12-piece seamless focus gear ring. (53-55 mm, 56-58 mm, 59-61 mm, 62.5-64.5 mm, 66-68 mm, 69-71 mm, 72-74 mm, 75-77 mm, 78-80 mm, 81-83 mm, 85-87 mm, 88-90 mm)"
