This 67mm Tiffen Water White Glass IRND Filter 67mm 7-Stopis a neutral density filter with a 128x filter factor that provides a 7-stop exposure reduction. Its 2.1 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 noncoated, is constructed from Water White glass for increased clarity, and features an aluminum-alloy filter ring for durability while remaining lightweight. It is made using ColorCore technology, a process that involves laminating the filter substrate between two pieces of optical glass and grinding flat to a tolerance of 1/10,000th of an inch.

2.1 Optical Density    Noncoated Water White Glass Construction    Aluminum-Alloy Filter Ring    67mm Front Filter Threads    Darkens Entire Image    Allows Reduced Shutter Speed    Allows Wider Aperture    Neutral Results, Visible, & IR Spectrums

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

Providing a 7-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.

Noncoated.

Aluminum-alloy filter ring for durability while remaining lightweight.

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

Knurled front edges provide a more textured grip when mounting or removing it from a lens.

Filter pouch for storage and transport.

Related Questions and Answers

Q: 1. Can anyone confirmed which version this is? B&H photos show the stop indicators on the side as being lines, but reviews show the indicators being actual numbers.

A: that is an older photo, yes it has numbers.

Q: 2. Can this be used with a Cokin 100 mm filter holder?

A: It can be used with the Cokin EVO ALUMINUM Z PRO series 100mm filter holder: https://www.bhphotovideo.com/c/product/1324221-REG/cokin_cbze01_evo_aluminum_filter_holder.html

Q: 3. Will this filter work with both a 58mm tele lens and 18mm wide lens?

A: This filters can work with any lens that has a 67mm front thread. However, you may experience vignetting on wider lenses.

Q: 4. Will this work on a zoom lens at minimum magnification? Or would I need a lens with fixed mm?

A: Will work with pretty much any lens but normal lens are considered to be lens with a focal length between 35mm to 50mm.

Q: 5. Will this fit over a 67 mm B&W ND filter on my lens or do I need to remove the ND filter first. Also, will a 67mm lens cap fit on this Syrp ND filter?

A: If your existing filter has 67mm front filter threads, you can attach a Syrp 67mm Variable Neutral Density Filter to it. It isn't recommended to use more than one ND filter at a time, however. You can attach a 67mm lens cap to this filter.

Q: 6. Is the front of this threaded to stack a diffusion filter with?

A: The front threading is mainly for use with a standard pinch type lens cap but it can also accept another filter.

Q: 7. What size is the front filter thread?

A: 7artisans Photoelectric 82mm 8-Stop Variable ND Filter does not have front threads. You can not stack another filter or cap on top of this ND.

Q: 8. What is the Low Profile Titanium Lock Ring? Is this a way of locking the filter, to stop it rotating?

A: The lock ring holds the glass in the main filter ring. It is low profile to avoid vignetting. This has nothing to do with the rotation of the filter for polarization.

Q: 9. I see the filter does not protrude from the sides like most NDs. Can you use the original lens hood with this filter?

A: Most likely, yes, but it depends on the lens and the hood.

Q: 10. I've read and heard online that this filter effectively cuts some measure of IR. How true is this?

A: Syrp does not list any specifications on IR transmittance. Without a listed specification, this is subject to product variance. It is impossible to guarantee a specific IR attenuation.