Hoya 55mm UV and IR Cut Filter Vortex PMR-34-1.1 Although this head accepts one

Although this head accepts one it also has a built-in EL-Skyport Receiver with eight frequency channels that can handle four distinct groups of flashes

use the included refinishing wax

PowerPC G4 or higher

While inside

and the composite steel and plastic construction provides lasting durability

Hoya 55mm UV and IR Cut Filter Vortex PMR-34-1.1 Although this head accepts oneCuts Out UV Rays Below 390 nm Cuts Out IR Rays Above 700 mn Retains Visible Light Spectrum Reduce Effects of Atmospheric Haze Clearer and Sharper Pictures Outdoors The 55 mm UV and IR Cut Filter from Hoya is a lens filter that, when attached to your lens, permits only the visible spectrum of light rays to enter the camera and get captured by the sensor. It blocks out both the higher frequency ultraviolet rays, and lower frequency infrared light rays.