Hoya 55mm Neutral Density (NDX4) 0.6 Filter ProTapes 001UPCSPIKE45MBLA Improved lock button design

Improved lock button design

And the benefits aren't limited to flash photography either

or via FTDI Basic Breakout to a computer

Built-In Signal-Strength Indicator

Hoya 55mm Neutral Density (NDX4) 0.6 Filter ProTapes 001UPCSPIKE45MBLA Improved lock button designMulti Coated (HMC) Glass The Hoya 55mm Neutral Density (NDX4) 0. 6 Filter has several uses and offers the possibility to achieve otherwise unachievable results. ND filters appear gray and reduce the amount of light reaching the film. They have no effect on color balance. Multi coated to minimize reflection at the filter surfaces which reduces flare and ghosting. Neutral Density filters have four main uses To enable slow shutter speeds to be used,