Heliopan Bay 70 Circular Polarizer Filter

BH #HECPB70 • MFR #707041
Heliopan
Heliopan Bay 70 Circular Polarizer Filter
Key Features
  • Helps to Eliminate Reflections and Glare
  • Reduces Haze and Blue Cast in Landscapes
  • Greater Color and Tonal Saturation
  • Brass Ring Construction for Durability
The Heliopan Bay 70 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.
Special Order
Expected availability: 4-6 weeks
$307.30

Important Notice

  • This item is noncancelable and nonreturnable.

Heliopan Bay 70 Circular Polarizer Filter

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Heliopan 707041 Overview

The Heliopan Bay 70 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.

The filter ring is constructed out of matte black brass, which provides durability and further prevention from glare. They also feature high quality Schott glass for greater optical clarity and color fidelity. The Bay 70 mount is compatible with the Hasselblad-specific bayonet lens mount.

Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection off of 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° 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.
Durable brass ring construction and Schott glass for optical clarity.

Heliopan 707041 Specs

Filter TypeCircular Polarizer
Filter Factor2.5 (1.3 Stop)
ShapeCircle
Circular SizeBay 70
RotatingYes
Filter MaterialGlass
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