Arca Swiss B1 vs Z1 in Accessories Posted January 17, 2010 <p>I have two B1s I've had for over 10 years. They both have the grey tension screws. Never any lock ups. I did put RRS quick release plates on them. The elliptical ball is the best in the business for controlling big lens.</p>
Arca Swiss B1 vs Z1
in Accessories
Posted