The front ring rotates with the polarization visible in the viewfinder or on your LCD screen. When shooting on a bright day, this means you can control the “blueness” of the sky as well as having control of how distinct you want the cloud formations. For the outdoor shooter, this filter is a must since it is the only way to make a blue sky bluer. In addition, when shooting into water or glass, you can minimize or eliminate the reflections often associated with landscape or scenic photography. Therefore, if you’re shooting a store window or inside a museum into a showcase, glass obstructions will no longer be a problem. A polarizer tends to have its maximum effect when used at right angle to the sun. A polarizing filter, along with a UV filter should be a part of everyone’s gear.

Note: Circular polarizers are specifically designed for use with auto-focus SLR cameras (They will also work on manual systems without problems)

This version of the filter is now slimmer than the original version that had a larger front thread. Presently, both front and rear threads are the same size
The glass is now multi-coated minimizing flare and glare on the sensor or film plane
Effective with cameras that use beam splitters in the path of the TTL light meter and with AF cameras
This filter eliminates ultraviolet rays from outdoor shots as well as polarizing the light to remove reflections, and increase color saturation, without affecting the overall color balance

Type Circular Polarizing II Filter
Size 77mm
Grade Not Applicable
Filter Factor Between 2.3 and 2.8 (approx. +1.3 stops)
Multi-Coated Yes
Rotating Yes
Effect Removes reflections and increases color saturation without affecting the overall color balance
Application Nature, travel, outdoor photography
Color Temperature Not Applicable
Construction Glass
Front Filter Thread Size 77mm
Front Lens Cap Size 77mm