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The AquaTech AR Coated Optical Glass Element manufactured by Schneider is compatible with AquaTech BT series sound blimp lens tubes that have a diameter of 116mm. Additionally, it works with their LT-TZ and LT-NTZ2 tubes for the Canon 70-200mm f/2.8 IS / IS II and Nikon 70-200mm f/2.8 VR II lenses, respectively.
In the Box
AquaTech AR Coated Optical Glass Element for Select BT / LT Series Lens Tubes