audijam: what's the relationship between Benro and Sirui?
They are made in the same town in China. Looking at the wording on their websites and product details one could assume they are under the same ownership?Who knows?
I just bought an OM1 with a almost perfect 50 mm f1.4 and using the lense on a Panasonic G1. and what a find. Guys look in cupboard, there might be hidden treasures. The lense works perfectly on the G1. Have you ever tried to control the DOF with autofocus lenses. Now it's like in the "olden"" days, manual focus and control DOF with the manual aperture. I am already looking for a OM macro and a 100 lense to buy.