B+W Circular Polarizer + KR1.5 Warmton F-Pro (77mm) brand_Tetenal pretty soon everyone realized that

pretty soon everyone realized that it is virtually impossible to widely share or display 3D photos

This lens maintains rangefinder coupling

with a slightly larger (but not even that large- 62mm- filter thread

The Benbo Trekker is a unique (and slightly awkward) tripod with some unique geometry

so you should be able to use it on other systems just as effectively

B+W Circular Polarizer + KR1.5 Warmton F-Pro (77mm) brand_Tetenal pretty soon everyone realized thatB+W KSM Circular Polarizer + KR1. 5 Warmton F Pro for 77mm filter threads. A high quality polarizing filter to reduce glare and reflections, with B+W's premium KSM polarizing material and a light warming effect. Image is for illustrative purposes only. Actual item may vary slightly.