This 6-stop, 100 x 100mm square Hoya Sq100 IRND Filter 100x100mm 6-Stopfrom Hoya Sq100 IRND Filter 100x100mm 6-Stopis a neutral density filter for the Sq100 Filter Holder system. It features HOYA's exclusive ACCU-ND technology, which achieves equal reduction of the light in visible and IR spectrums. This added IR filtration eliminates issues with color shift in any shooting conditions, when compared to conventional ND filters.

Neutral density filters are important for filmmakers and photographers because they allow precise control over the amount of light passing through the lens. For filmmakers, this means shutter speeds that match the camera frame rate while maintaining creative depth-of-field control. Using a longer shutter speed makes it possible to increase motion blur to convey a sense of movement, or to dial in a video camera frame rate. Increased density also makes it possible to shoot using wider lens apertures, helping to isolate a subject from the background.

1.8 Optical Density    2mm Thick Multicoated Optical Glass    Waterproof and Oil-Repellent Coating    Reduces Visible and Infrared Light    Darkens Entire Image Area    Includes Storage Pouch

The HD Sq100 Series neutral density filters feature an anti-reflection multi-coating that reduces reflections caused by scattered light rays, which is an important concern during long exposures. In addition, a waterproof and oil-repellent topcoat is applied for easy cleaning and maintenance.

If a single ND filter does not satisfy the requirement of the situation, or the photographer's vision, a combination of filters can be useful. For example: the combination of the HD Sq100 IRND64 plus the HD Sq100 IRND1000 will provide 16 stops of light reduction, enough to allow a camera to capture an image of the surface of the sun without overexposure.

Related Questions and Answers

Q: 1. does this fit Olympus tough TG5 ?

A: Yes, it does. But you have to buy the Olympus CLA-T01 adaptor in order mount the filter. This is the same adaptor that is used to mount the Olympus wide-angle and telephoto extender lenses on the camera.

Q: 2. Hi, are these the "super slim" frame? I have read about a couple people with sony camera lenses that have issues with the lens cap scratching the filter because of the slim/low profile design. Thanks

A: Hoya EVO Antistatic UV(0) Filters are scratch resistant. The ring is 4mm deep and has a front thread foto attach lens cap secure on top of the lens. Is very unlike for the filter to get scratch by the original lens cap of your lens because the part of the lens cap attaching in front of the filter is only about 2mm.

Q: 3. Will this filter fit my Nikon 85mm 1.8 lens?

A: If you are using the Nikon AF-S 85mm f/1.8G lens, it will fit. If you are using the Nikon AF 85mm f/1.8D lens, it will not. The 85mm f/1.8D uses a 62mm filter thread.

Q: 4. What is the proper technique for attaching the filter to the filter threads on the front of the lens? The filter is very thin, with very little to grip, but is further rendered difficult to screw on by the presence of the rotating section of the filter. Basically you can only hold the rotating part so it is tough to get the threaded portion to turn and screw into the threads on the lens. The rotating part just rotates so you can barely get any torque on the threaded portion. I finally got mine to screw in by pushing firmly toward the lens as I turned the filter. I don't want to damage anything. When using this technique the threaded portion turns slowly because it drags more on the lens threads.

A: Since submitting this question, I had a chance to look closely at the filter with my OptiVisor. It seems there is a very thin knurled ring on the threaded part of the filter just below the rotating part. I will have to practice and see if I can master threading it to the lens without cross threading or otherwise damaging anything. I do have a filter wrench, but the threads are so fine and delicate that it is even more difficult to tell if you are crossthreading. That will take some practice, too. The lens filter threads are inside a metal ring of sorts that prevents full sized fingers from being able to grip that knurled surface enough to be able to turn the ring to thread it in.

Q: 5. Does this filter fit the Nikon 500mm f/4 insert?

A: It does not. You will need B&H # NICPL405 which is the filter specifically designed for the drop in on that lens. https://bhpho.to/2X7oHNp

Q: 6. Does this filter fit on a Canon EPS 10-18 lens?

A: You shouldn't have any problems with this combination.

Q: 7. I do NOT want a slim profile filter. I am only interested in a 67mm CP filter. Is this a slim profile filter? thanks

A: The Hoya 67mm NXT Plus Circular Polarizer Filter is not a wide filter. It is a thin frame filter. This one is considered more of a standard frame, BH #BWCPB67 (https://bhpho.to/3WTjKsY).

Q: 8. Is this polarizer good for beach photos? Thanks!

A: I used this filter in the snows of Patagonia, the beaches of Argentina, the waters all about the Scotia circle and all about Antartica and surrounding waters and ice. Good job.

Q: 9. how much light is transmitted? 97% 99% ?

A: Visible light - 100%

Q: 10. Is this non-coated filter really worth $93.90 when there are so many other options out there?

A: The quality of the glass and the coatings of this filter are superior to many lower cost filters, if you have an expensive lens and or good optical quality, yes it is worth it.