The Tokina 4x5.65" PRO IRND 2.1 Filter 7-Stopis compatible with filter holders that can accommodate filters that are 5.65" 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 5.65" 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. Can this filter be used for solar eclipse photos?

A: No, the NiSi 77mm PRO Nano IRND 3.0 Filter (10-Stop) would not provide enough coverage for solar eclipse photography. You need at least 16 stop ND, preferably with UV/IR cut. Nisi has the following option. https://bhpho.to/3vaPO0g

Q: 2. will this fit in to a LEE 100 system?

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

Q: 3. Does this filter fit inside Tilta Mini Matte Box 82mm adapter ring?

A: Yes.

Q: 4. Does this go with the NiSi 82mm Swift VND Mist Kit 1-9 Stops (1-5-Stop VND, 4-Stop ND, Black Mist 1/4)?

A: The NiSi 82mm HUC PRO Nano IRND 1.8 Filter (6-Stop) can be used on any lens or filter that has an 82mm filter thread. It does not use the Nisi Swift Friction Mount System.

Q: 5. 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: 6. Does this filter fit on Lee filter holder ?

A: Yes.

Q: 7. Will this filter work in a Lee Foundations filter holder?

A: Yes it does

Q: 8. 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: 9. 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: 10. I have a mirrorless camera that I had converted for IR photography; regular ND filter do not have any effects on exposure; I want to shoot IR with long exposure, will this NiSi IRND do the job?

A: No, the NiSi 82mm PRO Nano IRND 3.0 Filter (10-Stop) would not be compatible for your usage needs. It does the opposite of what you are looking for; it is designed to block IR to the extent that there will not be infrared pollution when taking a long exposure. As an alternative, the filters in the NiSi Swift FS ND Filter Kit (82mm), B&H # NIRFSNDSWK82, are designed to pass all wavelengths of light evenly, so this would also be an alternative for your usage needs. Also, as standard neutral density filters pass along infrared light unless it specifically indicates it has IR reduction, a filter such as the Hoya ProND EX 1000 Filter (82mm, 10-Stop), B&H # HOPNDEX1T82, should also work for your usage needs. https://bhpho.to/3ieQ30o https://bhpho.to/3LZm8bn