With this product, the left housing grip can be positioned forward to provide easy access to the focus knob on the Extension Ring 46 with Focus Knob #30117 with Focus Gear.
Specifications
Dimensions (WxHxD): 10 x 25 x 54mm / 0.4 x 1.0 x 2.1 inches
Weight(including accessories): Approx. 55g / 1.9oz
Construction: Corrosion-resistant aluminium alloy (alumite coating)