This 95mm Blackstone Infrared ND Filter from Wine Country Camera is an ND filter with a 1000x filter factor that provides a 10-stop exposure reduction. Its 3.0 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By increasing aperture or slowing exposure time, you are able to control depth of field and convey movement more easily. Neutral density filters do 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 neutrality across the visible and infrared spectrums in order to eliminate color casts and ensure cleaner, truer blacks, one layer of Blackstone ND Coating is applied to each of this filter's surfaces. The Blackstone ND Coating is also designed to help minimize any effect on a digital camera's resolution when using this filter.

This Wine Country Camera {pnsize}mm Blackstone Infrared Neutral Density 3.0 Filter is constructed from Schott Ultra White Glass for clarity as well as color fidelity. It features an aluminum-alloy filter ring for durability while remaining lightweight.

3.0 Optical Density    Schott Ultra White Glass Construction    Aluminum-Alloy Filter Ring    95mm Front Filter Threads    Top Knurling    Darkens Entire Image    Reduce Shutter Speeds    Widen Apertures    Neutral Results, Visible & IR Spectrums    Includes Plastic Case

3.0 neutral density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required

Providing a 10-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

Each surface includes one layer of Blackstone ND Coating that attenuates infrared light as well as visible wavelengths, to maintain color neutrality and suppress color casts due to increased exposure times

Blackstone ND Coating is designed to help minimize the filter's effect on a digital camera's resolution

Constructed from Schott Ultra White Glass for clarity and color fidelity

Aluminum-alloy filter ring for durability while remaining lightweight

95mm front filter threads allow for use with other filters.

Top knurlings provide a more textured grip while mounting to, or removing from, a lens

Plastic filter case for storage and transport

Related Questions and Answers

Q: 1. What is the difference between the FireFly and Blackstone iterations of this lens? What do you get with the extra money for the Blackstone? Thank you!

A: The Blackstone has a metal body and engraved numbers. The Blackstone is heavier as well. Optically they are the same.

Q: 2. Can anyone tell me how to read/use the hyperfocal scale on this lens? I know what hyperfocal focus is and on most other lenses I know how to use it, but the scale on this lens is truly perplexing to me - specifically, why are there multiple aperture values on both the left and right sides of the centre mark? And there's also another hyperfocal marker above the distances as you approach the infinity mark. So far I've only been able to test it visually by taking the same photo at different focus values and comparing them on my computer to see which are the most in-focus. This is by no means a very technical approach to achieving the proper focus, so I'm very interested in learning how to properly use the hyperfocal scale on this lens. Thanks in advance for any information anyone can provide!

A: The aperture scales on the left and right of the focus mark indicate the approximate distances from the focal plane of the camera within which the image will be acceptable sharp at the current focus setting. It's referred to as a depth of field scale. The hyperfocal scale allows you to set your focus to the approximate hyperfocal distance for your current aperture, by aligning the f/number on the scale with the center focus mark. Irix has a good article on their site explaining DoF, hyperfocal distance and how to use both scales.

Q: 3. Can you adjust the aperture manually?

A: No, you cannot. The aperture of the IRIX 15mm f/2.4 Blackstone Lens for Canon EF, B&H # IR15BSC, would be controlled by the dials built onto your Canon body.

Q: 4. Specific to the Nikon F mount version ... does this lens have open-aperture metering, or stop-down metering?

A: the lens is open aperture metering as stop down I believe aperture is not adjustable on this lens, I only had one for a short time before I bought the Zeiss 15mm.

Q: 5. Will this work on the BMPCC4K with a Metabones Speedbooster (MFT to EF) ? Will there be vignetting?

A: Both the 0.71 and the 0.64 Metabones Speedbooster, show little to no vignetting.

Q: 6. Which square filter holder would work for this lens?

A: There are several options but I would recommend this Format kit: https://bhpho.to/3qYQvBH

Q: 7. Does the IRIX 15 have a focus confirmation chip for Nikon?

A: Yes, the Firefly has a focus confirmation chip for Nikon.

Q: 8. Anyone using this with a c100 mkii? If so, thoughts?

A: The IRIX 11mm f/4 Blackstone Lens for Canon EF is an excellent choice for someone interested in a super wide angle rectilinear lens for the C100 Mk II Digital Cinema Camera. The rectilinear design limits image distortion and the lens uses a positive lock mechanism that will make it easier to pull focus consistently and accurately.

Q: 9. Can someone please explain or help me to understand how to read the hyperfocal scale on this lens? I have never had a problem using hyperfocal scales on any of my other lenses, but this one is quite perplexing to me, there are so many values on it.

A: If you are old school and know how to use the hyperfocal scale on manual lenses, then work as you have before. If you wish, you can also use the innovative hyperfocal indication line but really it is meant for others. That is because, ever since auto focus lenses came into use, they have mostly come without manual aperture scales since they had no place for the scales to be applied. Therefore a generation of photographers has grown up not knowing what they are for or how to use them. With Irix's hyperfocal line, the new user determines what aperture they are using, moves the focus ring to line up the aperture number on the Irix hyperfocal line with the lens focus mark. Then they look to the aperture numbers on the traditional scale to see the hyperfocal distance or the area that is in acceptable focus. To old users it is not necessary, to new users it is very helpful.

Q: 10. Will this lens fit the canon reble t8i?

A: Yes, it will fit the T8i and is manual focus only.