LEE Filters 100 x 100mm ProGlass IRND 4.5 Filter (15-Stop)

The 100 x 100mm ProGlass IRND 4.5 Filter from LEE Filters is an ND filter with a 32,000x filter factor that provides a 15-stop exposure reduction. Its 4.5 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture, you can control depth of field and convey movement more easily. Neutral density filters are intended to not affect the coloration of the image and are ideal for pairing with other filters.

The design of this filter has been optimized for use with digital sensors and to promote nearly flat attenuation of visible and infrared light. Due to imaging sensors' greater susceptibility to infrared light, compared to traditional film, color casts can occur when photographing darker subjects that require increased exposure times.

This 100 x 100mm ProGlass IRND 4.5 Filter is constructed from scratch-resistant, optical glass for clarity as well as color fidelity and features a built-in gasket. This gasket works with a compatible LEE Filters 100mm System filter holder to help form a seal that is intended to prevent stray light, which could have unwanted effects on exposure, from coming in between the filter and the lens behind it. For efficient use in the field, an exposure guide is included that shows the amount of exposure reduction the 100 x 100mm ProGlass IRND 4.5 Filter provides, corresponding to a range of shutter speed settings from 1/1,000th of a second to 2 seconds before the filter is applied.