The 52mm Kase Magnetic Variable ND 52mm 6-9 Stop with Adapterfrom Kase Magnetic Variable ND 52mm 6-9 Stop with Adapterprovides an increase in neutral density through a 6 to 9-stop range. Increasing neutral density offers finer control in available shutter speeds or aperture settings for both still and video applications. It is fully compatible with Kase Wolverine, Kase Revolution, Kase Skyeye magnetic filters and lens caps.

1.8 to 2.7 Optical Density    Durable, Tempered Optical Glass    Easily Stack Filters    Tight 20º, 6 to 9-Stop Turn Radius    Anti-Rotation Locking Magnetic Adapter

Swap filters superfast, up to four Kase Wolverine filters can be stacked.

Precise marking on rim for accurate ND settings.

Tight 20-degree turn radius with hard locks at 6 to 9-stop for rapid adjustment.

Fully compatible with Kase Wolverine, Kase Revolution and Kase Skyeye 55mm magnetic filters and lens caps.

Stack 55mm Kase magnetic filters on top of each other.

Front ring is 55mm to prevent vignetting.

Related Questions and Answers

Q: 1. 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: 2. Is there a version of the drop-in filter mount that adopts PL lenses to RF?

A: This Fotodiox adapter is for PL lens to Canon RF camera and it has a built in ND filter. The filter is not drop in though. There isn't a version with drop in for that combination. https://www.bhphotovideo.com/c/product/1486458-REG/fotodiox_pl_eosr_ndthrtl_cine_vizelex_nd_throttle_lens.html

Q: 3. how bad is the vignette for ultra wide angle lens i.e. 11-24mm, 16-35mm?

A: If it is lens that covers a Full Frame Sensor, such as the Canon EF 11-24mm f/4L USM Lens B&H # CA11244LUSM, there should not be any vignetting. https://bhpho.to/2bPYxeO

Q: 4. filter itself? Is it a nano coated? Any details on color cast (blue)?

A: It is not nano coated and there is a slight blue cast on the upper range.

Q: 5. Does this work on the RP as well?

A: Yes, the Meike Drop-In Filter Mount Adapter EF to EOS-R with Variable ND Filter would be compatible for use on the Canon EOS RP Mirrorless Camera.

Q: 6. 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: 7. will these work with the smallrig mini mattebox?

A: The SmallRig Mini Matte Box comes with 67mm, 72mm, 77mm, and an 82mm Adapter Ring. You will need to use one of those depending on the lens. And then you can use most any other step-up ring to that.

Q: 8. How many stops is the filter range?

A: The filter's wheel will cut light from 1 to 9 stops, or an optical density of .3 to 2.7. It is not know at this time (11/20/2018) if this filter will also work in lenses that have a similar drop in filter such as the 200-400/4/1.4x lens. An answer to this should be available in January.

Q: 9. I am more concerning the image quality and autofocus speed when using this variable ND filter. Does it degrade the image quality or add othe color tone(s) or hue(s) to the captured image? Does it slow down the autofocus speed at all?

A: It works well , The darker the ND the slower the focus usually it gets , but in Mirrorless Digital Camera its not as bad , and it does not have a color shift

Q: 10. According to the video on this item it says that this drop in ND filter adapter also has the "super cool customizable control ring". I feel like BH made an error in that statement. Can anyone confirm or deny that the drop in filter adapter also has the control ring? Thank you

A: Unfortunately, that was an error; the Canon Drop-In Filter Mount Adapter EF-EOS R with Variable ND Filter does not have the Control Ring feature. We apologize for any inconvenience this may have caused you.