Some wide-angle and video zooms have a retractable actable lens assembly which means that the COKIN Filter Holder may inhibit the use of some focal lengths. To remedy this situation, use a protective screw-in filter (UV or SKY1A) and add one or several "extension rings" between the screw-in filter and the adaptor ring of the filter-holder. Extension rings are also useful with some home video cameras which have elements obstructing the free rotation field of the filter-holder.
Features & Spec
Cokin A-Series R4646 46mm Extension Ring
Same sized front and rear threads
Warranty: 5 years
Weight: 30 grams
Product Dimensions: 3.5 x 3.5 x 0.1 inches
SKU: R4646
Kit content Cokin 46mm Extension Ring A Series R4646 User guide
For more information about, Cokin 46mm Extension Ring A Series R4646 website.