Helix MagLock™ - McKinnon

Love it. Quality, speed, and convenience warrant the price. Building out the quiver quickly.

Can't believe how much of an upgrade these are over the traditional threaded filters. I was also running Tiffen VND's (2-8 stop) before, and these have way less vignetting, for a much cleaner image.

PolarPro customer service and shipping is an absolute nightmare.