The Heliopan 28mm Circular Polarizer Filterhelps 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 polarizer differs from a linear polarizer in that it supports full use of a camera's autofocus and auto exposure functions.

The front and rear surfaces of the filter both feature a single anti-reflection coating. Each coating helps to increase light transmission by reducing reflections, scattered light, and ghosting. Additionally, they offer protection to the filter substrate while helping to keep the glass clean for longer than uncoated glass.

This Heliopan filter is constructed from Schott glass for increased optical clarity and color fidelity. It features a brass filter ring for durability as well as jamming prevention.

Minimize Reflections and Glare    Reduces Haze and Blue Cast in Landscapes    Enhances Color and Tonal Saturation    28mm Front Filter Threads    Front and Rear Coating    Schott Glass Construction    Brass Filter Ring

Reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.

Arrange and filter directionally polarized light perpendicularly to the reflected light allowing for the absorption of much of the light.

Lessens haze in distant landscapes and provides more saturated, vivid colors.

Strongest effect when used at a 90° from the sun.

Single coatings on both the front and rear offer protection to the glass and help to improve light transmission and image quality.

Constructed from Schott glass for optical clarity.

Brass filter ring helps to prevent jamming and provides additional strength.

Dual threading with 28mm front filter threads permits combining with other filters.

Related Questions and Answers

Q: 1. Which diameter filter cap will fit this? Obviously a push on type cap as it doesn't have threads.

A: Since this is a relatively obscure size for lens caps, I advise you to use a Hood Hat from Op/Tech to better protect your lens. These hood hats are made from neoprene, so it will stretch to custom fit your lens/filter combination: http://bhpho.to/1i0bRV6

Q: 2. Hello, what is the thickness of the frame without the thread?

A: I would recommend contacting Heliopan; Distributed By - H.P. Marketing CorporationTel: 800-735-4373 Website http://www.hpmarketingcorp.com/ Email info@hpmarketingcorp.com

Q: 3. Is this filter threaded so that a screw-in lens hood can be used?

A: The Heliopan 77mm Slim Circular Polarizer SH-PMC Filter does not have front filter threads. As such, no, you would not be able to use a lens hood on the front of the Heliopan 77mm Slim Circular Polarizer SH-PMC Filter.

Q: 4. what is filter thickness?

A: I REALLY DO NOT HAVE A DEMININSION IT IS THE SLIM FILTER THAT IS ALL I CAN TELL YOU.

Q: 5. Thanks, but I would prefer a hard lens cap as it protects more and won't touch the lens while transporting. I did find a Sensei 105mm Clip-On Lens Cap (http://www.bhphotovideo.com/c/product/818347-REG/Sensei_lcc_105_105mm_Clip_On_Lens_Cap.html) -will this fit any 105mm filter?Also, B+W USA seems to have a 105mm filter cap. Do you have it for sale and will it fit any 105mm filter?

A: A 105mm clip-on cap will not fit on this filter, as there are no threads on the filter to clip the cap onto. We do not currently sell the 105mm filter cap from B+W, as they have discontinued their line of slim filters and it is no longer available to us.

Q: 6. I have Lee 100mm system. is it fit on lee kit?

A: If you purchase the LEE Filters 105mm Accessory Front Thread Adapter Ring, B&H # LEFARPFK105, then yes, the Heliopan 105mm Slim Circular Polarizer SH-PMC Filter would be compatible for use with the LEE Filters Foundation Kit.

Q: 7. What accessories are best for cleaning this filter?

A: The Zeiss Compact Portable Lens Care System would be a good way to clean the filter and any other filters and lenses you have. http://bhpho.to/1bIaWKz

Q: 8. Hi,What is the main difference between this filter and Heliopan 46mm High-Transmission Circular Polarizing Multi-Coated Filter ?I see that the filter factor for this one is between 2.3 and 2.8For the High-Transmission version is 2.0. That means more quality for the High-Transmission one.Do both of them feature the index markings on the edge of the filter ring ?The High-Transmission one doesn't have a slim mount, does it ?!And one last question: do they have the same glass and coating ?Kind regards !

A: The main difference between the Multi-coated Heliopan 46mm Circular Polarizer and the 46mm High Transmission Circular Polarizer is the filter factor; the high transmission CP will have a filter factor of one stop, where the multi-coated has a factor of approximately 1.3 stops. Both filters feature index markings. The high transmission CP does not have a slim mount. Both filters have the same 16-layer coating, and are both produced from Schott glass.

Q: 9. I have a leica Q (bought with B&H). do I need adapter, or it can be fitted perfectly?

A: If the thread size of your lens is 49mm this filter will work fine.

Q: 10. What are the numbers (1-18) around outside edge of polarizer?

A: The numbers on the mounting ring are used as calibration dots to help with finding consistent rotational positioning.