The 4 x 5.65" Schneider Combination ND & Circular Polarizer Filter is a filter that combines a solid neutral density effect and a circular polarizer effect within a single glass surface. The solid neutral density effect provides an exposure reduction of 4 stops. Its 1.2 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than would normally be required. By slowing your exposure time or increasing your aperture, you are able to control depth of field and convey movement more easily.

Along with this filter's solid neutral density effect is a circular polarizer effect that is simultaneously applied to help 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 4 x 5.65" Neutral Density 1.2 Circular Polarizer Filter is constructed from water white glass for increased optical clarity as well as color fidelity. It is compatible with filter holders that can accommodate 4mm-thick, 4 x 5.65" rectangular filters.

1.2 Optical Density    Non-Coated, Water White Glass    Darkens Entire Image    Allows Reduced Shutter Speed    Allows Wider Aperture    Integrated Circular Polarizer Effect    Reduces Haze in Landscapes    Helps to Eliminate Reflections and Glare    Greater Color and Tonal Saturation

1.2 neutral density filter effect darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required and is combined with a circular polarizing effect to help reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface

16x filter factor provides a reduction of 4 stops; neutral density filter effect 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

Clears up haze in distant landscapes and provides more saturated, vivid colors

Strongest polarizing 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

Constructed from water white glass for increased optical clarity

Non-coated

Padded pouch included for storage and transport

Related Questions and Answers

Q: 1. I need hard stop screws for this item. We lost one of them. Do BnH have replacement or other screw that are compartible?

A: The FILMCITY HS-2 Follow Focus with Hard Stops (B&H# FIHS2) comes with two of those hard stop thumbscrews. Unfortunately, that sort of exact replacement would only be able to come from the manufacturer. However, since you do seem still to have one other such screw, taking it to your local hardware store and asking for one of the same size and with the same threading should net you a workable option. Alternatively, if you want to contact the manufacturer to inquire about an exact replacement then you may do so here: https://bit.ly/3b5Wwuv

Q: 2. Will these fit Mefoto A1350?

A: Yes, the MeFOTO SMRTSA Replacement Leg Stops for RoadTrip S Aluminum Tripod (3 Sets of 4 Shims) would be compatible for use with the MeFOTO A1350 RoadTrip Aluminum Travel Tripod.

Q: 3. Can I use it on the Ivation Pro Steady DSLR Rig System with Shoulder Mount? Or does it work only on rigs with 15mm Rod Systems?

A: This follow focus lists for use with 15mm rods. It is possible to add a 15mm rod baseplate between the Ivation Pro Steady DSLR Rig System and camera. Product example is CAMVATE Baseplate with 7.9" 15mm Rods for Select Canon/Sony Cameras (Red Wingnut) BH #CAC1519 • MFR #C1519. https://bhpho.to/2EUl4mO

Q: 4. Can the drive gear be positioned on either side of the gearbox to accommodate a wider variety of mounting options?

A: Yes it can be mounted left or right side on the camera rods. For me, i use it left handed with the Sony FS7.Mounting it on the right side on this camera, may conflict with the handgrip.

Q: 5. I would like to thread on a ND filter onto this drop-in cpl, is that possible? what size ND filter do I need?

A: The Nikon 52mm Circular Polarizer (C-PL3L) Glass Filter - Drop-In does not allow for the polarizing filter to come off and to be changed with another filter or to add to it.

Q: 6. Will the Nikon 2221 slip in filter work with the 400mm S lens?

A: No, the Nikon 40.5mm Drop-in Circular Polarizing Filter MFR 2221 ( https://bhpho.to/3J8jCvk ) is not compatible with the NIKKOR Z 400mm f/2.8 TC VR S lens. The Nikon C-PL460 Slip-In Circular Polarizer is compatible with the 400m S lens.

Q: 7. Are these shims compatible with the Benro Aero 7 A3883TS7 Aluminum tripod?

A: Yes, the MeFOTO SMWAS Replacement Leg Stops for WalkAbout S Aluminum Tripod (4 Sets of 4 Shims) are compatible with the Benro Aero 7 Travel Video Tripod (Aluminum) (BH #BEA3883TS7 • MFR #A3883TS7).

Q: 8. Is the filter adjustment ring water resistant? Seems like a place that could potentially let in water into the lens during rain.

A: I am not sure but its a direct replacement for the filter that comes with the lens. I use a Thinktank cover any time Im shooting where the lens could get wet.

Q: 9. Does it have height adjustability or just horizontal?

A: This does not have a vertical adjustment.

Q: 10. How do I rotate the Nikon C-PL 460 Slip-In Circular Polarizer? to adjust to get rid of glare?

A: The Nikon C-PL460 Slip-In Circular Polarizer has a dial/gear on the top that rotates the filter.