Hoya 77mm alpha Circular Polarizer Filter

Hoya 77mm alpha Circular Polarizer Filter

Hoya 77mm alpha Circular Polarizer Filter

B&H # HOCPA77 MFR # C-ALP77CRPL
Hoya 77mm alpha Circular Polarizer Filter

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Product Highlights

  • Circular Polarizer Filter
  • 3 to 4x Filter Factor, +1.6 to 2 Stops
  • Helps to Eliminate Reflections and Glare
  • Reduces Haze in Landscapes
  • Greater Color and Tonal Saturation
  • Non-Coated
  • Optical Glass
  • Aluminum Frame
  • 77mm Front Filter Threads
  • Plastic Case
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  • 1Description

The Hoya 77mm alpha Circular Polarizer Filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. A polarizing filter arranges, and filters, this directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage.

A circular polarizer only differs from a linear polarizer in that it contains a quarter wave plane in addition to the linear polarizing filter. The addition of this quarter wave plane is to circularly polarize the linearly polarized light for the use of auto focus and exposure functions. Due to how the light is broken down and filtered with a linear polarizer, auto focus and exposure accuracy become skewed during use. When the light becomes circularly polarized, it permits the use of these functions.

This filter is non-coated and has approximately 96% average light transmission. It is constructed from optical glass and precision milled aluminum frames.

Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.
Polarizing filters arrange, and filter, directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the light.
Clears up haze in distant landscapes and provides more saturated, vivid colors.
Strongest effect when used at a 90° angle from the sun.
Circular polarizers are ideal for use with digital cameras and autofocus lenses where a linear polarizer will often disrupt auto exposure and focus features.
Non-coated.
Approximately 96% average light transmission.
3 to 4x filter factor reduces exposure by 1.6 to 2 stops.
Constructed from optical glass and precision milled aluminum frames.
Plastic filter case for storage and transport.
UPC: 024066056214
In the Box
Hoya 77mm alpha Circular Polarizer Filter
  • Plastic Filter Case
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
    Filter Type Circular Polarizer
    Filter Factor 3 - 4 (1.6 - 2 Stop)
    Shape Circle
    Circular Size 77 mm
    Front Accessory Thread / Bayonet 77 mm
    Filter Material Glass
    Coatings None
    Packaging Info
    Package Weight 0.18 lb
    Box Dimensions (LxWxH) 4.3 x 3.6 x 0.5"
    77mm alpha Circular Polarizer Filter is rated 4.7 out of 5 by 6.
    Rated 5 out of 5 by from Love this filter!! I used this at the wedding I shot this past weekend and it made the images outside much better and the colors are amazing!! I love the look it gives for the whole scene. I can't wait until I get a chance to do some landscape with it.
    Date published: 2015-06-11
    Rated 5 out of 5 by from great pola. great pola filter....but have to watch out for it getting stuck to other filters. used it with UV and got stuck.
    Date published: 2014-03-14
    Rated 5 out of 5 by from Wonderful Great filter. Not only protects your lens, but it protects your highlights too.
    Date published: 2016-11-18
    Rated 4 out of 5 by from 77mm polarizer filter I use this on my 10-22m wide angle Canon lense for landscape photography.
    Date published: 2015-10-25
    Rated 5 out of 5 by from Circular filter Love it....used it on our trip to mountains.
    Date published: 2014-10-19
    Rated 4 out of 5 by from I'd recommend it Nice, well built.
    Date published: 2015-01-20
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