The Formatt Hitech 4.5" Firecrest ND 1.5 Filter is an ND filter with a 32x filter factor that provides a 5-stop exposure reduction. Its 1.5 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 are able to control depth of field and convey movement more easily. Neutral density filters do not affect the coloration of the image and are ideal for pairing with other filters.
Formatt Hitech Firecrest filters are constructed from SCHOTT Superwite Glass for increased optical clarity as well as color fidelity, and promote nearly flat attenuation of visible, UV, 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 filter provides a high level of neutrality across all three spectrums in order to eliminate color casts and ensure cleaner, truer blacks.
To eliminate internal ghosting and reflections, each glass surface of the Formatt Hitech 4.5" Firecrest Solid Neutral Density 1.5 Filter features 15 layers of anti-reflection coating. These coatings also offer greater protection to the filter and help it to stay clean for longer than with uncoated filters, resulting in an improved beading effect when in contact with water for greater cleaning efficiency.