This 12-stop H&Y K-Series Drop-In ND Filter 12-Stopfrom H&Y K-Series Drop-In ND Filter 12-Stopprovides a 12-stop exposure reduction. Mounted within an aluminum-alloy filter ring, it is made specifically to fit between a separately available H&Y Filters 100mm K-Series Filter Holder and one of the filter holder's adapter rings. It darkens the entire image area, allowing you to photograph with a wider aperture or slower shutter speed than normally required. Increasing the lens aperture allows finer control over depth of field and bokeh, making it easier to help isolate the subject of an image. Slowing exposure time helps increase image blur.

K-Series Drop-In Neutral Density Filters are constructed from Schott B270 glass for increased optical clarity and color fidelity. Each side of this filter includes eight layers of antireflection coating to prevent internal ghosting and reflections as well as an anti-smear nano coating for an improved beading effect when in contact with water or oil for easy cleaning. Neutral density filters do not affect the coloration of the image and are ideal for pairing with other filters.

3.6 Optical Density    8-Layer Multicoating on Each Surface    Schott B270 Glass Construction    For 100mm K-Series Drop-in Filter Holder    Darkens Entire Image Area    Allows Reduced Shutter Speed    Allows Wider Aperture    Aluminum-Alloy Filter Ring    Includes Filter Pouch

• Drop-in neutral density filter for a separately available H&Y Filters 100mm K-Series Filter Holder
• Darkens entire image area, providing a longer shutter speed to increase blur and convey movement
• May also provide wider aperture for finer depth-of-field control
• No effect on image coloration, ideal for use with other filters
• Can be used with still imaging or video
• Eight layers of antireflection coatings to prevent internal ghosting and reflections on both surfaces
• Anti-smear nano coating for improved beading effect with water or oil for easy cleaning
• Constructed from SCHOTT B270 glass for increased optical clarity
• Filter pouch for storage and transport

Related Questions and Answers

Q: 1. Will this work with the Canon EF 800mm f/5.6 L IS USM lens?

A: Unfortunately the Canon Drop-In Variable ND Filter A (1.5-9 Stop) is not compatible with the 800mm lens. Currently there are no variable ND filter options for the 800mm RF f5.6 lens. You can use a solid ND 52mm using the holder that comes with the 800mm lens.

Q: 2. I have a RF 24-70mm lens, do I just place this acessory behind the lens? Would it fit?

A: No, this filter system is for use in the Canon EF to RF lens adapter that takes drop in filters.

Q: 3. Does this have the option to not use any ND, while keeping the filter in the adapter to avoid dust seeping into the hole?

A: You will need to add this clear filter to the drop in filter slot in the Canon EF RF filter adapter. This filter will make sure no dust gets in the camera. https://www.bhphotovideo.com/c/product/1434115-REG/canon_3444c001_drop_in_clear_filter_a.html

Q: 4. fits in the smallrig Lightweight Carbon Fiber mattebox ?

A: No it can not.

Q: 5. Up to how many stops can it provide?

A: The headline and specs both say 1.5 to 9 stops.

Q: 6. does it let you know what stop its set at ?

A: It has reference marks.

Q: 7. does this filter include a gasket?

A: No, this ND filter does not have a gasket.

Q: 8. What is a recommended storage case for the filter when not in the adapter?

A: A Domke 11x11" Color Coded Protective Wrap (Gray), B H # DOPW11G would be a suitable option to store this filter. https://bhpho.to/3t8GR0O

Q: 9. Will this drop in the Canon 300mm 2.8 just like the Polarizer Filter will?

A: Canon Drop-In Variable ND Filter A (1.5-9 Stop) is compatible only with the Canon Drop-In Filter Mount Adapter for EF-EOS - R lenses. It will not fit on Canon EF 300mm f/2.8L IS II USM Lens. You can use fixed ND filters with the following product: 1-Canon - Drop-In Filter Holder for 52mm Screw-In Filters BH #CAFHS52 https://www.bhphotovideo.com/c/product/186092-REG/Canon_2612A002_Drop_In_Filter_Holder_for.html/accessories

Q: 10. does it works with Haida M10 holder?

A: Yes. The Haida M10 holder takes 100mm 2mm-thick filters such as this Haida 100x100mm ND1.8 filter. :)