Lee Filters ProGlass 100x100mm IRND 6 Stop 1.8 ND Glass Filter

ProGlass 100x100mm IRND Filter

The Lee Filters ProGlass IRND is a neutral-density glass filter built for professional photography and film production. It reduces light intensity by 6 stops while maintaining accurate color balance across the frame. Infrared and ultraviolet blocking ensures pure blacks and vibrant colors in bright conditions. The 100x100mm format fits compatible filter holder systems for creative flexibility.

Foam Seal Prevents Light Leaks

A foam seal on the 6-stop version creates a snug fit against the filter holder to stop unwanted light leaks during long exposures. This seal works alongside the multi-coated glass to preserve contrast and prevent flare over extended shooting sessions. The filter is designed for the slot nearest the lens to maximise the effectiveness of the seal. Consistent performance is maintained across variable lighting without degradation.

Check Holder Compatibility And Slot Order

Verify that your filter holder accepts 100x100mm square filters before purchase. The foam-sealed design requires placement in the slot closest to the lens for a proper light-tight fit. Ensure adequate clearance for stacking with neutral density grads or polarising filters if combined use is planned. The 1.8 density value corresponds to a 6-stop reduction for exposure calculations.