This 49mm Variable ND Lens Filter can be adjusted to block 1 to 8.6-stops of light, giving you more flexibility in bright variable light. By blocking up to 8.6-stops, you can use wider apertures in bright variable light for shallower depth of field effects and slower shutter speeds for long exposure effects without overexposing your images.
Cinematographers can use this Variable ND Lens Filter to create more cinematic effects in bright light. The filter comes with a protective travel tin case, a recycled cleaning cloth, and recycled plastic-free packaging.

Variable 0.3 to 2.6 Optical Density    Offers Better Creative Control    Create More Cinematic Effects

Related Questions and Answers

Q: 1. Can you please confirm this will fit on the Tamron 17-28 f/2.8 Di III RXD lens. Will the 72mm front thread accept a 2nd filter?

A: The Tamron 17-28mm f/2.8 Di III RXD Lens for Sony E has 67mm front focus threads. As such, the K&F Concept Variable Fader ND2-ND400 Filter (67mm) would be compatible to fit the front filter threads on the Tamron 17-28mm lens. A 72mm filter would not directly fit on the front of the Tamron 17-28mm lens without the use of a step-up ring such as the Sensei 67-72mm Aluminum Step-Up Ring, B&H # SESUR6772.

Q: 2. Does anyone know the difference between all the series of ND filters from K&F concepts (ie, nano, B-series, C-series, etc)??

A: The K&F Concept Nano X-Pro Variable filters features double-sided multi-coating and advanced Nano-coating that effectively minimizes reflections and improved image clarity. These are considered the top of their line. The K&F Concept B-Series filters features 8 layers of coating with good optical quality that is suitable for most photography needs. The K&F Concept C-Series are the base level filters with double-sided multilayer blue coating.

Q: 3. Are the filters glass? or acrylic/plastic?

A: The filters on the K&F Concept Variable Fader ND2-ND400 Filter are made of glass.

Q: 4. Is there a lens cap for K&F Concept Variable Fader ND2-ND400 Filter (49mm)?

A: The back of the filter is 49mm but the front is 52mm so you can use this 52mm lens cap on it. https://www.bhphotovideo.com/c/product/807037-REG/Sensei_lc52_52mm_Center_Pinch_Snap_On.html

Q: 5. What size slip-on cap fits the 77mm size? Spec says front is 82mm; only push on is Kaiser 82 & people say it it's not a 82mm.

A: We check the K&F Concept Variable Fader ND2-ND400 Filter (77mm) in the store and it has 82mm front threads. So you can use an 82mm front clip on filter such as this: https://bhpho.to/4aMTVOT

Q: 6. Would this fit or which will fit a Sony A7 IV 28-70mm Lens?

A: You would need the 55mm version of the K&F Concept Variable Fader ND2-ND400 Filter (72mm).

Q: 7. Is it best to put this VND on before or after a mist filter?

A: It generally does not matter if you put the K&F Concept Variable Fader ND2-ND400 Filter (82mm) on before or after a mist filter, it can come down to preference.

Q: 8. Are they hard stops?

A: Yes the stops are hard on the K&F Concept Variable Fader ND2-ND400 Filter. You can feel the filter pause as you rotate it past each mark so you know how many stops you are blocking.

Q: 9. What size lens cap fits this?

A: A 69 or 70mm push on cap should fit.

Q: 10. Does it work in continuous autofocus mode of sony cameras with the Sony FE 28 mm f/2 Lens?

A: If the filter is set to the darker end, that may interfere with the continuous autofocus.