This Firecrest Joel Tjintjelaar 100mm Signature Edition Long Exposure Kit #1 from Formatt Hitech contains three filters that can be used individually or in various combinations to create a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required, as well as a circular polarizer to prevent distracting reflections or glare. The included filters consist of an 82mm Firecrest circular polarizer, plus three 100 x 100mm Firecrest solid neutral density filters that reduce the amount of light entering a lens by up to 10, six, and three stops, respectively. 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.
To allow these neutral density filters to be placed in front of a lens, this kit contains a 100mm Firecrest Filter Holder that is designed to allow for the convenient use of up to two, 100mm-wide, 2mm-thick filters along with the included circular polarizer. This holder has its sides encased within a cover that helps to eliminate stray light, which could have unwanted effects on exposure, from coming in between any installed filters, as well as the filter holder and the lens behind it.
Use of the filter holder can be easily accomplished by first screwing an included 82mm adapter ring onto a lens with 82mm front filter threads. Step-up rings are also included to allow the adapter ring to be used with lenses that have 67mm, 72mm, or 77mm front filter threads; while additional step-up rings are separately available for lenses with 46mm, 52mm, 58mm, or 62mm front filter threads. After being fitted onto the adapter ring, the filter holder's pull-and-release locking lever helps to provide a reliable, yet adjustable connection that allows the holder to be rotated 360°, further benefiting the use of graduated neutral density and other filters that are enhanced by varied positioning.
An exclusive Joel Tjintjelaar booklet is also part of the kit, offering inspiration and insight into his long-exposure photography.
Formatt Hitech Firecrest neutral density filters are constructed from Schott Superwhite glass for increased optical clarity and color fidelity. They are optimized for use with digital sensors 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 prevent internal ghosting and reflections, the glass surfaces of each included Firecrest neutral density 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. The neutral density substrate of a Firecrest neutral density filter is also sandwiched between two layers of glass, enhancing durability and reparability of accidental scratches.