The Tokina 4x4 PRO IRND 2.1 Filter 7-Stopis compatible with filter holders that can accommodate filters that are 4" wide and 4mm thick. It is an ND filter with a 128x filter factor that provides a 7-stop exposure reduction. This filter's 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 slowing your exposure time or increasing your aperture, 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 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. To provide a high level of neutrality across the visible and infrared spectrums in order to eliminate color casts and ensure cleaner, truer blacks when using this filter, one ACCU-ND Vapor Deposition layer is sandwiched between two layers of optical glass.

This Tokina 4 x 4" PRO IRND 2.1 Filter is constructed from optical glass for clarity as well as color fidelity, and its sandwich design protects the ACCU-ND substrate while the glass surfaces can be re-polished should they become accidentally scratched.

128x Filter Factor, 7-Stop    Darkens Entire Image    Allows Reduced Shutter Speed    Allows Wider Aperture    Neutral Results, Visible, & IR Spectrums    ACCU-ND Vapor Deposition Layer    Optical Glass Construction    Padded Pouch

Compatible with filter holders that can accommodate filters that are 4" wide and 4mm thick.

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.

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

One ACCU-ND Vapor Deposition layer 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.

Padded pouch included for storage and transport.

Related Questions and Answers

Q: 1. How thick are these filters? I'm looking for one 4mm thick to fit my mattebox tray.

A: Yes, these filters are 4mm thick.

Q: 2. is there a particular reason Nisi makes this density in 100x100mm and not 4x4? I need 8 stop ND to complement my Nisi IRND set

A: You can use 100x100 filters. 100x100 is the same as a 4x4 filter.

Q: 3. Will my lens hood still fit on my lens with this filter?

A: Typically this is determined by the lens in question, but because the front and back are the same diameter, it shouldn't be an issue.

Q: 4. will this fit in to a LEE 100 system?

A: Yes. Lee systems adapts to all 4x4, 4x6 and all 100mm filters

Q: 5. Can another filter be stacked on top of this?

A: Yes, Kolari Vision Pro IRND Filter (95mm, 2-Stop) has a 95mm front and back threads. You can connect filters or lens caps to the front threads.

Q: 6. What is the warranty on this product?

A: NiSI filters come with 1 year warranty in the US only. They are distributed through Ikan Corp in Texas.

Q: 7. I have heard these will fit 114mm lenses like Rokinon Xeens, even though these are 112mm. How is that possible?

A: The Rokinon XEEN lenses have a front diameter of 114mm, so this filter would not be compatible.

Q: 8. Would this pair well with the Nisi ND-Vario Pro Nano 1-5 stops, to create a variable 4-8 stops ND?

A: While the NiSi 72mm PRO Nano IRND 0.9 Filter (3-Stop) does have a front thread, it is not advisable to use two variable ND filters at the same time as it would create undesirable results.

Q: 9. one paragraph specifically says "This filter IS designed for direct solar viewing" then another paragraph says it is NOT ?

A: The Kolari Vision Pro IRND Filter (20-Stop, 77mm) does not allow direct solar viewing with your bare eyes/optical viewfinder. It allows for solar photography.

Q: 10. 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.