This 67mm lg counter depth refrigerator water filteris an ND filter with a 2x filter factor that provides a 1-stop exposure reduction. Its 0.3 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By increasing your aperture or slowing your exposure time, you are able to control depth of field and convey movement more easily. Neutral density filters are intended to not affect the coloration of the image and are ideal for pairing with other filters.

The design of this filter has been optimized for use with digital sensors and to promote nearly flat attenuation of visible light and infrared light. Due to imaging sensors' greater susceptibility to infrared light, compared to traditional film, color casts can occur when photographing darker subjects that require increased exposure times.

This filter is constructed from Water White glass for increased clarity as well as color fidelity. It is made using ColorCore technology, a process that involves laminating the filter substrate between two pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch, and then mounting to precision metal rings.

0.3 Optical Density    Water White Glass Construction    ColorCore Technology    67mm Front Filter Threads    Darkens Entire Image    Allows Reduced Shutter Speed    Allows Wider Aperture    Neutral Results, Visible & IR Spectrums    Includes Plastic Case

0.3 neutral density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.

Providing a 1-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily.

Attenuates infrared light to maintain color neutrality and suppress color casts due to increased exposure lengths.

Filter does not affect coloration of the image and is ideal for use with other filters.

Constructed from Water White glass for increased optical clarity.

67mm front filter threads allow for use with other filters.

Plastic filter case for storage and transport.

Related Questions and Answers

Q: 1. How big is this weight? what are the weight's dimensions?

A: approximately 5 x 4.5 x 5

Q: 2. Can you put this weight on a LS-CB6 boom stand from impact ?

A: Yes you can put this weight on the Impact LS-CB6.

Q: 3. i just opened the box and it needs to be assembled and I didn't receive instructions....can someone tell me how?

A: There are no instructions on the counterweight. But this is a drawing for a different version but is similar and it shows it broken down, http://bit.ly/1FnABb5.

Q: 4. What is the light transmission of this?

A: Sigma does not have any published specifications for light transmission of this CPL (which I believe is typical because most CPLs have filter factors in a range) but does advertise a 30% increased transmission over their competitors' CPLs. This filter does have a 0.3-0.5 stop reduction of light, which equates to a theoretical numerical transmission of 81.2% (at 0.3 stops) to 70.7% (at 0.5 stops), the formula being 100% multiplied by half to the power of 0.3 and 0.5.

Q: 5. what is the difference between sigma WR protector clear glass filter 95mm vs Sigma WR Ceramic protector filter 95mm ?

A: The WR Ceramic Protector Filter would use a clear glass ceramic substrate which has added strength and a higher transmittance value over the WR Protector Filter which uses a glass element that is not as strong.

Q: 6. what is wr stand for?

A: Water resistant

Q: 7. Is this a perpetual license or 1-year (or other timeframe)?

A: The Axis Communications People Counter Software E-License BH #AX01147011 is an annual license.

Q: 8. Any vignetting when mounted on a Zeiss 15mm lenses on Nikon D810?

A: This filter may cause vignette when mounted on a full frame camera and 15mm lens.

Q: 9. Is this binder archival quality?

A: This binder is not archival grade.

Q: 10. Please confirm whether separate purchase of the 01147-011 people counter license is required or if it's included?

A: A license is not required when using the AXIS P8815-2 3D People Counter.