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. Drop-In K-Series Neutral Density 0.9 and Circular Polarizer Filters are constructed from Schott B270 glass for increased optical clarity and color fidelity. They are mounted within a geared aluminum-alloy filter ring assembly with an external dial, which allows for the independent rotation of the filter in order to adjust the intensity of its polarization effect. Each side of this filter includes eight layers of anti-reflection coating to prevent internal ghosting and reflections as well as an anti-smear nano coating for an improved beading effect when in contact with water or oil for greater cleaning efficiency.
- Drop-in neutral density and circular polarizer filter for a separately available H&Y Filters 100mm K-Series Filter Holder
- 0.9 neutral density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required
- Providing a 3-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily
- Polarizing filter effect arranges, and filters, directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the light
- Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface
- Clears up haze in distant landscapes and provides more saturated, vivid colors
- Strongest polarization effect when used at a 90° angle from the sun
- Circular polarizer effect is ideal for use with digital cameras and autofocus lenses where a linear polarizer will often disrupt auto exposure and focus features
- Each glass surface includes eight layers of anti-reflection coatings to prevent internal ghosting and reflections as well as an anti-smear nano coating for an improved beading effect when in contact with water or oil for greater cleaning efficiency
- Constructed from Schott B270 glass for increased optical clarity
- Filter pouch for storage and transport
H&Y Filters Drop-In K-Series Neutral Density 0.9 and Circular Polarizer Filter (3 Stops) for H&Y Filters 100mm K-Series Filter Holder
- Filter Pouch
- 1-Year Warranty
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Easy 30 Day Return Policy
If you are dissatisfied with your purchase for any reason, you may return it to Kellards within 30 days of the purchase date, subject to the conditions and exclusions below.
You may initiate a return or exchange by requesting an RMA at firstname.lastname@example.org.
Securely affix your return label to the outside of the shipping package. Return shipping fees are the responsibility of the customer. We recommend you ship via insured ground service with a tracking number. We cannot be responsible for lost packages.
Return AddressKellards Return
3237 Greenpoint Ave.
Long Island City NY 11101
Please read conditions below. If all conditions are not met, Kellards reserves the right to refuse the return or to charge a minimum 15% restocking fee. All returned items must be in new condition, in their original unaltered box (including an intact UPC code) and must include all packing material, blank warranty cards, manuals and accessories. Kellards can only refund the original purchase price. Shipping and handling fees are nonrefundable.
- Electronic software downloads
- Opened consumable items (e.g., film, tapes, paper, bulbs, CD, DVDs, ink cartridges, etc.)
- Underwater equipment that has been submerged
Defective or Damaged Items
Defective items may be repaired, exchanged or refunded at our discretion for the same model or manufacturer's equivalent model.
Please allow 3-5 business days for mail-in exchanges to be processed.
Refunds & Credits
Once we receive and inspect your item(s), we will credit your account. Please allow 5-7 days for a credit to appear on your account. In most cases, we will issue your refund in the same way you made the original purchase.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.