This is the Lee Polariser Landscape Filter 105mm for 100mm System [LEELANDPL105]

Well-suited to outdoor and nature photography, the Lee Landscape Polariser Filter 105mm helps to reduce reflections and glare as well as increase the overall saturation of an image. This unique polariser filter is also characterized by a slight warm bias that, in addition to increasing contrast in skies, also helps to enhance green, brown, and gold tones. It is compatible with the LEE 100mm system, via an optional 105mm accessory ring, and features a slimline profile to reduce the likelihood of vignetting on lenses as wide as 16-17mm.

A polarizing filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. This results in a noticeable increase in the saturation of skies and foliage, as well as clearer imagery when photographing in hazy conditions. A circular polariser differs from a linear polariser in that it supports full use of a camera's autofocus and auto exposure functions. This filter is constructed from optical glass for maintained image quality and is set within an aluminium filter ring. Due to its slim profile, this filter does not have front threads for stacking additional filters.

Features:
Minimize Reflections and Glare
Reduces Haze and Blue Cast in Landscapes
Enhances Colour and Tonal Saturation
Warm Bias for Enhanced Earth Tones
Optical Glass Construction
Slimline Aluminium Filter Ring
Compatible with 100mm Holder System

Specification:
Type Circular polariser with warm tint
Size 105mm
Filter Factor Approx. 3 (1.6 stops)
Multi-Coated No
Rotating Yes
Effect Reduce/eliminate reflections and haze and improve colour and tonal saturation
Construction Optical glass, Aluminium alloy filter ring
Front Filter Thread Size None
Front Lens Cap Size 1