This 40.5mm Tiffen Digital HT ND Filter is a solid neutral density filter providing a 4-stop exposure. This 1.2 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed without overexposing your image. 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 do not affect the coloration of the image and are ideal for pairing with other filters.

The Digital HT coating is a high-transmission multi-coating that surpasses military specifications for hardness and durability. This optical purity combined with high scratch resistance results in an easy-to-clean filter with superb imaging quality. This filter also features low-profile titanium filter rings for increased strength and vignetting reduction.

1.2 Optical Density    Digital HT Multi-Coating    ColorCore Technology    Low-Profile Titanium Filter Ring    Increase Exposure Length    Reduce Shutter Speed

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

Providing a 4-stop exposure reduction, this filter allows you to control depth of field and convey movement more easily.

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

Digital HT multi-coating provides increased strength, durability, and optical clarity for greater light transmission and protection against scratches.

Tiffen filters are 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, then mounting to precision metal rings.

Related Questions and Answers

Q: 1. Does this fit on a Sigma 17-50mm f/2.8 EX DC OS HSM Zoom?

A: Yes, the Sigma 17-50 you've described is a 77mm diameter lense. This filter will fit.

Q: 2. 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: 3. Does this fit on a Canon RF 24-105mm L lens? Without touching the glass?

A: Yes it fits on any lens that has a 77mm filter thread such as the Canon RF 24-105mm f4 L lens.

Q: 4. What’s the transmission value of this filter? Thanks

A: Filter Factor 2.3x (1.2-Stop) to 2.8x (1.5-Stop)

Q: 5. I'm looking for a 62mm polarizing filter for a 18-250 zoom I recently bought at B & H, on top of wanting a decent one I want one with a solid lens cap, I will be leaving this on the lens allot and a good filter is not much use if it is dirty or scratched. I previously bought B+W that had a useless plastic cap that would not stay on. Will the sigma lens cap attach to this or does it come with a decent one?

A: The Tiffen 62mm Digital HT (High Transmission) Circular Polarizing Multi-Coated Filter is front threaded at 62mm's so you will be able to use the Sigma lens cap as designed.

Q: 6. I do not see a high transmission ultra-slim or low profile version of this filter. Will this polarizing filter cause vignetting with wide angle lenses?

A: when using wide angle lens we highly suggest using filter with slim profiles to avoid vignetting.

Q: 7. How does this compare to the wide angle low profile filter that is about $40 cheaper? Which one is recommended for videography/filmmaking?

A: The wide angle version is meant for wide angle lenses to prevent vignetting. Otherwise, both versions have the same purpose in mind.

Q: 8. Does this filter have front threads that will accept a screw-on lens hood?

A: Yes, it does. I use it with a lens hood often.

Q: 9. What is the thickness of the 77mm Digital HT (High Transmission) Circular Polarizing Multi-Coated Filter by Tiffen? I plan to use it on a 17MM lens and want to make sure there is no vignetting.

A: The Tiffen 77mm Digital HT (High Transmission) Circular Polarizing is about 3mm thick.

Q: 10. Recommended circular polarizing filter for Canon 100-500 to ne used in snow conditions also use clear filter on lens allways?

A: Tiffen 77mm Digital HT (High Transmission) Circular Polarizing Multi-Coated Filter have front threads of 77mm if you preffer to have an uv filter in the front. However this filter has the highest scratch-resistant coatings. If you would be shooting outdoors the filter factor cuts between 1.2-1.5 stop of light to help correct exposure when shooting with snow.