The Tiffen 4 x 5.65" 2 Solid Blue filter is part of Tiffen's award-winning series of colour filters and is one of the most widely used. They enhance reality, adding a touch of subtlety or drama to the image. This filter gives you the option to add more "punch" to an otherwise ordinary scene. Tiffen filters give you the control you need to create a scene rather than simply photograph it. The Soft or Hard label indicates the degree of colour gradation. Whether at the professional level or Photo 1, Tiffen filters have always been the industry's first choice. - Add colourful excitement to a dull sky - Change a specific colour in a scene to create a desired special effect - Enhance existing colour or create subtle colour drama - Create a more balanced exposure in uneven lighting conditions ColorCore Technology Tiffen filters are manufactured using ColorCore technology, an exclusive closely guarded process that involves permanently laminating the filter material between two pieces of optical glass that are polished flat to tolerances of one ten-thousandth of an inch, then mounted in precision metal rings - The ColorCore process allows Tiffen to control the colour and density of their filters, as well as the characteristics of special effects filters with far greater precision than typical mass-dyed filters, which generally exhibit variations in colour and density. Superior Quality Major Hollywood film studios trust Tiffen filters for their multi-million pound productions - Superior quality and design make Tiffen the preferred choice of filmmakers, professional photographers and even NASA - Tiffen has also received an Emmy from the Academy of Television Arts and Sciences for its excellence in engineering Specifications