The 150 x 150mm LEE ProGlass IRND Filter 150x150mm 15-Stopfrom LEE ProGlass IRND Filter 150x150mm 15-Stopis an ND filter with a 32,000x filter factor that provides a 15-stop exposure reduction. Its 4.5 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture, you can 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 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 150 x 150mm ProGlass IRND 4.5 Filter is constructed from scratch-resistant, optical glass for clarity as well as color fidelity and features a built-in gasket. This gasket works with a compatible LEE Filters SW150-series filter holder with an integrated or add-on Lightshield to help form a seal that is intended to prevent stray light, which could have unwanted effects on exposure, from coming in between the filter and the lens behind it. For efficient use in the field, an exposure guide is included that shows the amount of exposure reduction the 150 x 150mm ProGlass IRND 4.5 Filter provides, corresponding to a range of shutter speed settings from 1/1,000th of a second to 2 seconds before the filter is applied.

4.5 Optical Density    Scratch Resistant, Optical Glass    For SW150-Series Filter Holder    Darkens Entire Image    Allows Reduced Shutter Speed    Allows Wider Aperture    Neutral Results, Visible, & IR Spectrums    Gasket for Light-Blocking Seal    Exposure Guide    Padded Pouch

• Compatible with a Lee Filters SW150-series filter holder.
• 150 x 150mm neutral density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required.
• Providing a 15-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 appropriate for use with other filters.
• Attenuates infrared light as well as visible wavelengths, to maintain color neutrality and suppress color casts due to increased exposure times.
• Constructed from optical glass for clarity.
• When combined with a LEE Filters SW150-series filter holder, built-in gasket helps to prevent light from coming in between the filter and the lens behind it, which can have an unwanted effect on exposure.
• Exposure guide for efficient use in the field.
• Padded pouch included for storage and transport.

Related Questions and Answers

Q: 1. Does this filter has a foam like old Lee Stoppers to block light leak ?

A: Yes, the LEE Filters 100 x 100mm ProGlass IRND 1.8 Filter (6-Stop) has the Gasket for Light-Blocking Seal.

Q: 2. How thick is this filter?

A: This filter is approximately 2mm thick.

Q: 3. How is this different from the big stopper?

A: The big stopper is 10 stops and this filter is 15 stops.

Q: 4. Will this filter fit in the Vu 150mm filter holder?

A: While not tested, we feel that there should be no issue using this filter in that holder.

Q: 5. Will a Lee 150mm ND filter fit properly in an NiSi filter holder?

A: yes, it will fit nicely.

Q: 6. Does anyone know what it's: "IR Attenuation" ?

A: IR attenuation in the Ice 82mm Slim IRND1000 Filter (10-Stop) means that the filter reduces the amount of infrared light that can reach the camera sensor.

Q: 7. what is the light reduction in stops?

A: Because the Kase 150x150mm Wolverine Neutral Night Light Pollution Filter selectively blocks only certain wavelengths of light (yellow light from sodium-vapor lamps, mercury-vapor lamps, or low Color Rendering Index LEDs), there is no overall assignment of light-blocking capability for this filter.

Q: 8. What Filter Thickness is? 2 or 4 mm?

A: Haida 4 x 5.65" V-Pro Series MC IRND 0.6 Glass Filter (2-Stop) are 4mm thick.

Q: 9. Does anyone have a comparison on the Super Stopper compared to Lee's ProGlass 15 stop filter? Almost twice the price, is it worth it?

A: The LEE Filters 100 x 100mm ProGlass IRND 4.5 Filter (15-Stop) B&H # LEPGIRN15100 is more expensive because it combines two filters in one. Not only the ND but it also has an IR filter as well. Because digital sensor are susceptible to the infrared that get through the ND, this helps to keep your blacks from going to a very-hard-to-correct magenta color shift.

Q: 10. Can this be used as a drop-in filter (with the threaded drop-in) with Canon 300mm f2.8L IS USM II & 600mm f4L IS USM II lenses?

A: Yes, the Hoya HD MKII IR ND8 Neutral Density Filter (52mm) can be used as a drop-in Canon EF 300mm f/2.8L IS II USM Lens and the Canon EF 600mm f/4L IS II USM Lens.