• This 100mm filter kit is usable with Hitech 100mm holder systems or any 100mm holder system.
• Soft edge grads have a smooth transition from clear to ND.
• Made from the highest quality optical resin.
• Made in the UK on advanced computer-controlled manufacturing equipment.
• Compatible with Canon, Sony, Nikon, Tokina, Sigma, Zeiss, Panasonic, Tamron, Samyang, Rokinon and other lens brands.

Product Description ------------------- The Grad Kit 6 contains the most commonly used densities of the Soft Edge Neutral Density filter - 0.3 (1Stop), 0.6 (2 Stops) and 0.9 (3 Stops). Save over 22% compared with purchasing the filters separately. Neutral density (or ND) filters produce a grey neutral tone and are used in photography to reduce light, enabling more control over exposure and depth of field without affecting color contrast. NDs are also available in graduated filters, both in hard and soft edge. These filters are clear in the bottom half of the filter with a gradual transition to the ND effect in the top half. They are primarily used for light reduction in skylines of landscape s. Graduated NDs are available in Soft Edge or Hard Edge varieties. Soft edge grads have a smooth transition from clear to ND. Hard edge grads have a more defined hard lined transition and are usually used for longer focal lengths. ND Grads are made in different densities according to the level of light reduction from 1/3 to as much as 4 Stops of light. This 100mm filter kit is usable with Hitech 100mm holder systems or any 100mm holder. The filters in this kit are 100mm Wide but 150mm long to enable easy movement up and down in the holder. The kit is also available in 85mm, 150mm and 165mm sizes. Hitech filters are made from the highest quality 1.5mm optical resin. From the Manufacturer --------------------- About Formatt-Hitech -------------------- Formatt-Hitech filters are designed and manufactured in the UK. Formatt-Hitech takes a scientific approach to light modification and designs filters using advanced spectrography to manufacture the most evenly balanced and well matched filters in the world. By using a spectrograph, Formatt-Hitech designs filters of varying density that modify light in the same way, just to varying degrees of intensity. So you can switch from a 0.3ND to a 1.2ND without changing the look of your project. Strict quality standards also mean that if you break a filter today, we can replace it tomorrow with a filter virtually identical across the frequency spectrum. So your 5 piece matched set of ND filters will always remain a matched set of filters, even if one should break and need replacing. Technology ---------- Formatt-Hitech use our award winning and exclusive Absorbing Cell Technology process to dye the resin. The Absorbing Cell Technology process absorbs dye into each cell of the resin rather than coating onto it, ensuring that the affect is applied consistently across the filter. This means that each Formatt filter can be consistently replicated time after time. The densities and formulation of the dying process are strictly computer controlled, creating the most accurate filter reproduction in the world. Materials Science ----------------- Formatt-Hitech's resin was designed specifically for use as a lens material and has an index of refraction nearly identical to the finest optical glass. Formatt-Hitech's resin has the highest scratch resistance of any optical plastic and it is resistant to most solvents, s, aging and material igue. Meaning that your resin filter investment will provide many years of good service. Formatt-Hitech's resin is completely transparent to the visible spectrum and opaque to ultraviolet light to eliminate UV contamination on your digital sensor. Choosing a Filter System ------------------------ Using a filter holder rather than a circular screw-in filter allows you to make a single filter purchase that is used across a variety of lenses. 85mm filters are an excellent choice for small mirrorless camera systems such as Leica M and Micro Four Thirds systems, or DSLR users with small lenses. The 100mm system is an excellent all-round choice. 100mm filters are popular for DSLR photographers and DSLR cinematographers using larger, more expensive lenses. Typically, most solid filters are square. Graduated filters are rectangular to allow for vertical adjustment of the horizon.