Tiffen Variable Neutral Density (ND) Filter (Various)

The Tiffen Variable Neutral Density Filter is a versatile and flexible tool, affording you the convenience of using several Neutral Density filters all in one. Primarily used as a photographic tool for controlling depth of field and exposure, the Variable ND is being sought in the video market as well because it is fast, easy to use, small, lightweight, and does not require additional accessories such as a matte box. 

Features

• Provides 2 to 8 stops of light control
• Thin profile ring - 9mm
• Wider outer optic to help reduce vignetting at wide angles
• Comes in Tiffen Professional packaging with padded black nylon pouch
• Made with high quality optical glass using Tiffen's ColorCore technology
• Made in the USA
• 10-year warranty

Your Tiffen Variable ND should be handled with care to avoid dirt, scratches and fingerprints.  Store it in its protective pouch when not in use. Your filter can be damaged by being dropped, by overexposure to extreme temperatures or humidity, improper cleaning, or by being left unprotected in direct sunlight. Use cleaners that are made specifically for cleaning filters and optical lenses and follow product instructions.

IMPORTANT:
Only use your Variable ND within its recommended 2 to 8 stop range. If you go beyond the “MAX”, you may experience an uneven exposure or color shift that appears as an “X bar” in the image. This is more common when using higher densities on full frame cameras; however, can be experienced on any camera. This is a common issue– it’s the law of physics when combining two polarizing filters; however, this issue can be eliminated. First, adjust your focal length and then reduce the density (stop value) setting by rotating the filter ring until the color shift disappears. 
The Tiffen Variable ND has a thin profile with a wider outer ring to help eliminate vignetting when using wide lenses. However, due to the vast number of combinations of cameras, lenses, sensors and other factors, we can NOT predict under what circumstances vignetting will occur and to what degree. We suggest simply adjusting your focal length, position and/or composition to remove the vignetting—use your digital camera’s display for reference.
NOTE: The small indexed dots on the filter ring between “MIN” and “MAX” density settings are intended for reference only. They are not representative of a specific density (stops).