Collaboration between respected wildlife photographer and conservationist B. Moose Peterson of Wildlife Research Photography and THK Photo Products, Inc., has created a circular polarizing filter that uses 81A optical glass made by Hoya, the worlds largest optical glass manufacturer, instead of the clear optical glass of a normal circular polarizer.
When using a camera with a split beam metering system (a metering system that employs a polarized half mirror) which is most of todays auto focus camera bodies, traditional linear polarizers will cause exposure errors due to their light absorption properties. Circular polarizers yield the same optical effect while not causing exposure problems with modern metering systems. For many years, polarizers have been used to remove reflections from non-metallic surfaces such as water and glass as well as being used to darken blue skies to increase contrast in scenic photography.
A side effect of both linear and circular polarizes is they cool down or make the overall color balance of a scene slightly bluish. The addition of the 81A glass corrects the color temperature, bringing the scene back to the original 5500K for daylight films color balance. The 81A glass creates a much more pleasing and warm color balance to the entire scene while the circular polarizer increases color contrast and reduces the effect of atmospheric haze.
UP TO 80% OFF ALL STOCKOnce it's gone, it's gone.Grab yourself a bargain!
STOCK DUE The product is not currently in stock however our best estimate of the date we are due to receive more stock is indicated by the date shown. This does not guarantee all orders placed will be able to be fulfilled from the stock we are receiving on this date but is the best date we are able to provide as an estimate.All displayed dates are subject to change without notice.Also note once we receive stock it may take a number of days for this stock to be sent to our customers
ON ORDER The product is on order with a supplier but not currently in stock and we do not have a clear enough date from our supplier as to when the stock is due to arrive.In this situation we cannot therefore provide an estimated availability date to you
NO STOCK The product is not currently in stock and we do not have this on order with a supplier. Our product page will display an estimated lead time if you were to place a no stock item on backorder
