The Hitech 100 x 125mm Graduated Neutral Density 0.3 Soft Edge Filter is a professional quality graduated 1 stop (2x) ND filter with soft graduation, making it the standard for general landscape shots. Hitech 100 Neutral Density Graduated filters enable the shooter to adjust exposure without affecting colour balance. For example, when photographing landscapes in which the sky is much brighter than the foreground, placing the neutral density part of the filter onto the sky in the frame will reduce the sky exposure without affecting the foreground. This enables cloud detail to be kept correctly exposed in the picture. These 100x125mm filters fit in the Lee filter holder and are manufactured from the highest quality optical grade polyester resin.
Lee Yellow 10 Resin Colour Correction Filter.
The Lee Filters 100mm Deluxe Kit contains: a filter holder; a landscape polariser to polarise the image and add a warm tone; the Big Stopper, which reduces the exposure by 10 stops; a 1.2 (4-stop) ND medium grad filter for shooting into the sun; a 0.9 (3-stop) ND hard grad filter, which is renowned for its versatility; and a 0.6 (2-stop) ND medium grad filter, the perfect all-around filter.
Coral Filters can be used as general warm-up filters, or provide special effects. The Lee Coral Filter is a pinkish warm-up filter, redder than the 81 series. As the number increases, the amount of colour temperature correction increases.
These filters control the spectrum by reducing the transmission at specific wavelengths. They are primarily used to colour balance films, the required filter being determined as a result of tests, or as specified by the manufacturer. They can also be useful for correcting light sources for which no one conversion filter exists, or for adding a deliberate colour bias.