Nerd Facts on Step-Up Rings, PolarPro, ND/PL Filters, & Knurling
Comparison of filter step-up rings from PolarPro, Breakthrough & Fotodiox; a review of PolarPro’s ND/PL Filters & a closer look at knurling usage in design.
Comparison of filter step-up rings from PolarPro, Breakthrough & Fotodiox; a review of PolarPro’s ND/PL Filters & a closer look at knurling usage in design.