This K&F Concept Variable ND Filter 49mm 5-9 Stopsfrom K&F Concept Variable ND Filter 49mm 5-9 Stopsis a 49mm variable neutral density filter providing adjustable light reduction from 5 to 9 stops. This multi-coated filter reduces the entry of light and does not affect the coloration of the image. Allowing greater control for long exposure and motion blur techniques in changing light, it is possible to create a dynamic look for waterfalls, landscapes, and more. The filter's slim design reduces possible vignetting, and the K&F peak technology avoids images with inconvenient x cross. Made of optical glass combined with an aluminum alloy frame, this filter is also green film anti-reflection, waterproof, and oil and scratch resistant.

Variable 1.5 to 2.7 Optical Density    28-Layer Multicoating    Optical Glass Construction    Water, Oil, and Scratch Resistant    Greater Control    For Long Exposure and Motion Blur    Avoids X Cross and Vignetting

Related Questions and Answers

Q: 1. Will these caps fit over the Tiffen 77mm or 82mm Variable ND?

A: Unfortunately no. The K&F Concept Soft Silicone Cap for Variable ND Filters (77mm) will only fit the K&F variable ND 77mm filters.

Q: 2. Does this cause vignetting when used on the Sony 16-35mm G PZ lens?

A: The H&Y Filters RevoRing 52-72mm Variable Adapter for 77mm Filters should not cause any vignetting when used with the Sony 16-35mm lens.

Q: 3. Will these work with a filter holder like a Nisi V6 or V7? That is, can I use the 82mm adapter to put the Nisi holder on a range of lenses?

A: The H&Y Filters RevoRing Variable Adapter Bundle (3 Adapters) are compatible with screw-in filters only.

Q: 4. Does the revoring work with the sigma 24-70 art lens?

A: Yes. The RevoRing 67-82mm variable adapter will work with Sigma 24-70mm f/2.8 Art lenses as they are 82mm front diameter lenses. However, according to some tests, there could be vignetting at the wide-end of the lens. Your results may vary.

Q: 5. I have 67mm polarized filter that i want to use on lenses that are smaller then 67mm(48-67) ..... which rovering to choose ? the 67mm or the 77mm ?

A: This H&Y RevoRing for 77mm filters will not work on your 67mm CPL filter. You should instead consider the H&Y RevoRing for 67mm filters, because that will work with your 67mm filter.

Q: 6. Does it block UV? Is it okay for at the sun when checking the movement of clouds?

A: Question : Does It Block UV? Answer : No, It Doesn't. But The VVF Allows The User To Add Additional Neutral Density Filters (Available Seperately) To Increase The Stop Range, UV Filters And Polarizers, Or Even Special FX And Diffusion Filters For Pre-Visualization Of A Scene Without The Need To Reposition The Camera. Anyway You Could Purchase Tiffen 49mm Digital Neutral Density Filter Kit Together With The Tiffen Variable Viewing Filter.Question : Is It Okay For At The Sun When Checking The Movement Of Clouds?Answer : Not Yet. It Is Not Okay For At The Sun When Checking The Movement Of Clouds Without Additional ND Or UV Filters. But It Is A Great Tool For Gaffers And Directors Of Photography To Spot Strong Lights Or Keep Track Of The Sun Moving In And Out Of cloud Cover With Additional ND Or UV Filters. For Identifying The Position Of The Sun When It Is Behind Clouds To Determine Where Shadows Will Fall. Warning : Only Use To Find The Sun Behind Clouds.My Advice : You Could Purchase Tiffen 49mm Digital Neutral Density Filter Kit Together With The Tiffen Variable Viewing Filter.Best Regards,Toke.Thailand.

Q: 7. Will these lens caps fit the 77 & 82MM Monfrotto Xume magnetic filter adapter sets?

A: Unfortunately no. The K&F Concept Soft Silicone Cap for Variable ND Filters (77mm) will only fit the K&F variable ND 77mm filters.

Q: 8. I'm unclear. I have lenses 52-72mm. I assume I would need a RevoRing 52-72mm Variable Adapter...plus what exactly? Their kickstarter page is even more confusing.

A: This adapter fits on lenses with a 52-72mm filter thread in order to allow the use of 77mm filters on it.

Q: 9. 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: 10. 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.