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Square 100x100mm glass filter with dark neutral tint and foam seal

Lee Filters

Lee Filters ProGlass 100x100mm IRND 15 Stop 4.5 ND Glass Filter

SKU CH-6RHD-SSWFY

100mm square glass filter cuts 15 stops of light with IR/UV blocking and foam seal for leak-free long exposures

  • Precision neutrality with virtually no colour shift
  • 15-stop density enables extremely long exposures
  • Blocks infrared and ultraviolet pollution for pure blacks
  • Foam seal prevents light leaks in the filter holder
  • Developed for professional film-industry demands

ProGlass IRND 15 Stop Filter

The Lee Filters ProGlass IRND 15 Stop 4.5 ND Glass Filter is a square neutral-density filter measuring 100x100mm. It is built for professional photographers and videographers who require extreme light reduction for long-exposure work. The filter delivers precision neutrality with virtually no colour shift and accurate stop values. It blocks both infrared and ultraviolet pollution to ensure pure blacks and vibrant colours.

Filter Holder Compatibility

This filter fits a standard 100mm filter holder system and should be placed in the slot closest to the lens for optimal results. A foam seal provides a snug fit that effectively prevents light leaks during extended exposures. The design allows versatile use alongside other filters such as neutral density grads or polarising filters for enhanced in-camera image control. It is not suited for buyers who need screw-in circular filters or smaller filter system sizes.

Optical Performance in Bright Conditions

The IRND coating maintains colour fidelity and accurate density during normal outdoor use under strong sunlight. By blocking infrared and ultraviolet pollution, the filter prevents the colour casts and muddy blacks that can appear during long exposures. The glass construction resists the demanding conditions found on professional film sets. It does not address heat buildup inside the camera body during very long exposures.

Highlights

  • Precision neutrality with virtually no colour shift
  • 15-stop density enables extremely long exposures
  • Blocks infrared and ultraviolet pollution for pure blacks
  • Foam seal prevents light leaks in the filter holder
  • Developed for professional film-industry demands

Specifications

No published specifications for this item yet.

Questions about this item

Will the 15-stop density require me to calculate exposure differently for very long shutter speeds?

The 4.5 optical density reduces light by 15 stops, so you must extend shutter speed or open the aperture by that amount; reciprocity failure may appear at extreme durations.

Does the foam seal on this 100mm filter trap heat during all-day video shoots?

The foam seal prevents light leaks around the 100x100mm glass; it does not contact the sensor, so heat buildup inside the camera is unaffected.

Which filter-holder system do I already need to mount this 100x100mm glass?

It fits any standard 100mm square filter holder; slot it into the groove nearest the lens for the foam seal to block light leaks.

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