The 1.5- to 10-stop, 49mm Nano-D Series Variable ND3-ND1000 Filter from K&F Concept rotates 360° between 1.5 and 10 stops of light reduction. It's made with Japanese AGC optical glass with 24 layers of multicoating. The glass is waterproof and scratch resistant. The filter frame is only 7.4mm thick.

0.5 to 3.0 Optical Density    Multicoated Japanese AGC Glass    Waterproof and Scratch Resistant    7.4mm Slim Filter Frame    Rotates 360° from 1.5- to 10-Stop

Related Questions and Answers

Q: 1. Will it fit Sigma 16mm F1.4 DC DN EF-M?

A: Yes, as the Sigma 16mm f/1.4 DC DN Contemporary Lens has 67mm filter threads on the front of the lens, the K&F Concept Nano-X Variable Fader NDX HD Green-Coated Waterproof Anti-Scratch Japan Optics Filter (67mm, ND2-32) is compatible for use with the Sigma 16mm f/1.4 DC DN Contemporary Lens.

Q: 2. So if I buy this set, would I be able to use it with my lenses 57mm all the way to 82mm in my R5 ?

A: Yes you could stack these and place an 82mm filter on a 37mm lens. You can also use them one at a time for a smaller change for example to use 62mm filter on a 58mm lens.

Q: 3. What is the filter factor of this filter? One stop or more?

A: B+W does not publicly publish this information in any of their data sheets, but independent testing yielded a loss of approximately 1.5-stops of light when using the B+W high-transmission MRC-Nano Master CPLs.

Q: 4. Can this be used in as a drop in rear element for a 400mm Nikon lens?

A: Unfortunately no. The K&F Concept 52mm Nano-X HD Variable ND2-32 Fader Waterproof & Scratch-Resistant Filter has a 52mm mounting thread for mounting on the front of a lens but the front of the filter has 55mm threads for using a 55mm cap or other filters. Therefore it is too large to fit into a 52mm drop in holder.

Q: 5. most my lens are between 52-72mm but my filter is an 82 mm could i buy the revo 77mm so it fits my lenses then get a 77-82 step up to attach the filter to the revoring?

A: Yes, you could use an 82mm filter with the H&Y Filters RevoRing 52-72mm Variable Adapter for 77mm Filters by using a 77-82mm step up ring?

Q: 6. This seems to be recommended for Leica Q2. Will it work with the lens hood in place?

A: Yes the B+W 49mm filter can be used with the hood that comes with the Leica Q2 camera.

Q: 7. Are these stackable ? For example can I use a set of these to use 82mm filter on my 46mm lens ?

A: Yes you can stack them and use a 82mm filter on a 46mm lens. The only downside would be that they are bulky.

Q: 8. Will this allow for a lens cap?

A: Yes, this B+W High-Transmission MRC-Nano Master Circular Polarizer Filter (82mm) has front threads to allow for the use of a lens cap.

Q: 9. WILL THIS FILTER WORK ON A LEICA 28MM-70MM R LENS?

A: Yes the B+W High-Transmission MRC-Nano Master Circular Polarizer Filter (60mm) should fit the Leica 28-70mm f/3.5-4.5 Vario-Elmar-R lens

Q: 10. Is it possible to use this matt box? https://www.bhphotovideo.com/c/product/1613745-REG/tilta_mb_t12_m95_4x5_65_carbon_fiber_matte.html/qa

A: No, The Tilta MB-T12 mattebox would not work with Titlta Mirage filters. The following matte box model supports the Mirage matte box filters. https://bhpho.to/3tbs4W8