Lee 4x 4" CC20C (Cyan) Colour Compensating (Colour Correction) filters act specifically on relatively narrow bands of colour. That is why they do not come in two colour variants (bluish & reddish) like conversion filters do. Instead, they come in three primary additive colours & their three secondary colours (which can be interpreted as the primary colours of subtractive mixing)
- each colour comes in practical density steps. Lee colour compensating filters are made in the following increasing densities: 0.025 (CC025), 0.05 (CC05), 0.10 (CC10), 0.15 (CC15), 0.20 (CC20), 0.25 (CC25), 0.30 (CC30), 0.40 (CC40), 0.50 (CC50). You can sandwich as many as three Lee polyester filters together without a noticeable loss of image quality. Some photographic situations require specific colour corrections. For example, when shooting daylight film under fluorescent lighting, some magenta correction is needed in order to remove the greenish tint that would otherwise appear.
...

Some photographic situations require specific Some photographic situations require specific colour corrections. For example, when shooting daylight film under fluorescent lighting, some magenta correction is needed in order to remove the greenish tint that would otherwise appear. The amount of colour correction required is most accurately measured via a colour temperature meter. Colour Compensating filters are available in the three primary colours: Red, Green, & Blue; & in the three secondary colours: Cyan, Magenta, & Yellow. A typical designation for one of these filters is CC30M. The "CC" stands for Colour Compensating. The "30" stands for a density of 0.30 & the "M" is for magenta. Lee colour compensating filters are made in the following increasing densities: 0.025 (CC025), 0.05 (CC05), 0.10 (CC10), 0.15 (CC15), 0.20 (CC20), 0.25 (CC25), 0.30 (CC30), 0.40 (CC40), 0.50 (CC50). You can sandwich as many as three Lee polyester filters together without a noticeable loss of image quality. ...

Lee Cyan 40 Polyester Colour Correction Filter. ...

Often it is necessary or desirable to balance the light intensity in one part of a scene with another. This is especially true in situations where you don't have total light control, as in bright contrasty landscapes. Sometimes it is also desireable to add colour to part of the photograph. For example, to add blue to only the sky. Lee colour graduated filters are half-colour, half-clear, with a graduated transition for blending into the scene. ...

The Lee Diffusion Lighting Filter Pack contains a selection of the most popular diffusion materials used to create a wide variety of effects ranging from a subtle softening of the beam edge to creating a large shadowless area. The pack contains twelve 250x 300mm gel filters (2 of each of the following colours 216, 250, 251, 253, 400 & 410) & a handy cutter to resize them as required meaning they can be used with a variety of light sources. ...

This Lee slotted filter hood has all the features of the Lee standard hood except that it is designed only to fit directly to the lens via an adaptor ring. It features two 2mm (double-slotted filter hood) filter slots immediately behind the bellows with vignette guides already fitted. This unit is ideal for social or studio photographers who may not require a full filter holder. ...

Designed for use with the DJI Inspire 1 & DJI Osmo handheld gimbal, the Lee Eagle Eye 0.6 ND filter is a solid 2-stop neutral density filter that means that you can control the shutter speed & create more natural-looking footage. Lightweight, it doesn't affect the balance of the gimbal, & has a deep thread to ensure that it doesn't fall off the lens. This high-quality filter causes no distortion. ...

The Lee Eagle Eye 0.9 ND is a solid 3-stop neutral density filter that is designed for use with the DJI Inspire 1 & DJI Osmo handheld gimbal, allowing you to control the shutter speed & create more natural-looking footage. Lightweight, it doesn't affect the balance of the gimbal, & has a deep thread to ensure that it doesn't fall off the lens. This high-quality filter causes no distortion. ...

Created to allow you to control the shutter speed & create more natural-looking footage, the Lee Eagle Eye 1.2 ND is a solid 4-stop neutral density filter that is designed for use with the DJI Inspire 1 & DJI Osmo handheld gimbal. Lightweight, it doesn't affect the balance of the gimbal, & has a deep thread to ensure that it doesn't fall off the lens. This high-quality filter causes no distortion. ...

A set of 2 spare or replacement face blades for the Lee Standard filter holder ...