Tiffen XLE Series aXent ND Filter (82mm, 10-Stop)

Technically it is not a multi-coated filter. But is made up of layers that allow different amounts of infrared light to pass through the filter and hit the sensor.

If your images are green when using this filter you should instead use the Tiffen ApeX filter. The green is caused by IR light reaching your sensor, the ApeX filter filters out the IR light while the AXent does not. We will speak to B&H in regards to correcting the description of this product.

What is the filter thread diameter?

This is a 10 stop filter which only allows 1/1000th of all light to pass through it. This will enable you to do long exposures with your camera on top of a tripod... you can blur anything that moves, including streams, waterfalls, clouds, etc. Please note, this is the AXent version of our XLE filters which has no IR protection and is only recommended for B&W photography. When shooting this filter with today's digital cameras, the sensor will also pick up IR light during a long exposure which will cause a color shift and your photo will come out magenta or possibly green. To eliminate this, you need the XLE AdvantiX (some IR protection) or the XLE ApeX filter (full IR protection).

Jesse.... ALL Variable Neutral Density Filters, regardless of manufacturer, can experience the X Bar effect. The X Bar is a result of the laws of optical physics when combining two polarizing filters, it is not a defect in the filter. VND filters use two polarizing filters, by varying the amount of cross polarization the amount of light passing through the filter can be adjusted.The X Bar effect is typically seen when shooting with a wide angle lens and using the VND at darker settings. Cameras with full frame sensors are more likely to see the effect, but it can happen on cropped sensor cameras as well. To eliminate the X Bar, simply adjust the focal length of your lens (zoom in) or adjust the VND filter to a lower density or a combination of both.