Use promo code twen20ty
at Focus Camera
to get the Marumi 72mm DHG Circular Polarizer
for $44.95 with free shipping. Regularly $64.95.
A circular polarizer can make a huge difference
in your photography. If you don't have one, you're missing out! Buy the largest size you need and use step-up rings
to allow a single CPL to be used on all your lenses (at least the ones compatible with screw-in filters).