FotoDiox Vizelex ND Throttle – Variable ND Lens Mount Adapter

If you're shooting video outdoors on a bright day with a DSLR or Mirrorless camera, chances are you're working with ND filters. ND Filters are essential to keep your shutter speeds down, while keeping your lens aperture wide open. One of the most annoying things of course is working with different lenses that each require different filter sizes and step up rings.

If you understand the frustration, then you'll be interested in checking out the new Fotodiox Vizelex ND Throttle Lens Mount Adapter. Instead of placing a variable ND filter on the front of the lens, the variable ND filter is actually built into the lens adapter (located behind the lens).

The first version of the Fotodiox Vizelex ND Throttle available is only for Canon EOS to Sony E Mount. Example compatible cameras listed are the Sony NEX-3, NEX-5, NEX-C3, NEX-5N, NEX-7, NEX-F3, NEX-5R, NEX-6, Sony NEX-VG10, NEX-VG20, NEX-VG30, NEX-VG900, NEX-FS100, NEX-FS700, NEX-EA50.

I don't see why a variable ND filter lens mount can't be made with M4/3 adapters, so hopefully that will follow up soon. Check out the product page for additional photos and specs for the new Fotodiox Vizelex ND Throttle (click here).

Canon eos-nex-pro-vzlx-thrtl-01 ND throttleCanon EOS EF to Sony NEX ND Variable lens Mount Vizelexeos-nex-pro-vzlx-thrtl-02 Cheesycam Fotodiox Lens Mount
find-price-button FotoDiox Vizelex Variable ND Throttle Canon EOS EF to Sony NEX E Mount Lens Adapter

24 thoughts on “FotoDiox Vizelex ND Throttle – Variable ND Lens Mount Adapter

  1. Hey folks,
    I'm interested in the Vizelex throttle for use with legacy Canon glass on my Panasonic GH4.
    Having read that many lenses become sharper when stopped down from their widest aperture, I'm wondering if the Vizelex will have the same effect or whether it's an effect of the narrowing of the light beam?
    I'm probably going to go with fully manual lenses with their own aperture control but, if I want to get a more modern lens that only has by-the-wire aperture, I believe I'll be stuck with the aperture fully open (unless I carry a Canon Camera purely for the purpose of stopping down the lens which I understand can be done with a half pressed shutter button / turn off the power workaround)

  2. Andy

    I find that the nd throttle is solely useful for video with manual focus / manual aperture rings. What this would be useful for is if you want to buy a lens that has a filter size over 77mm like the rare lenses that have 95mm fronts or if you are buying a wide manual focus lens that does not have a front filter.

    It would be overall a lot cheaper to purchase the nd throttle than to buy a 145mm front filter set for video.

    I look forward to seeing a smart adapter version of the nd throttle as it would be a lot more useful to get aperture control with non-manual efs lenses while using the adapter.

  3. Emm

    Post author

    @David - There have been great reviews on the Holy Manta, but it's actually more than $300 dollars and it's only available for Canon EF Lenses. So if you plan to use a Canon FD to MFT (like for BMPCC cameras), there's no other adapter in the world with a built in variable ND filter right now except for the throttle.

    I don't know how popular these type of adapters are so we'll see if any other companies choose to follow and offer us more options, but having gone through the manufacturing process myself, I have a feeling you won't see anything else for at least a year.

    It's too bad you can't simply pull the ND filter out of the throttle, but this is more of a convenience tool for people who shoot outdoors and need to move fast. I can see wedding teams using something like this. Otherwise there are better ways to obtain best quality such as using a MatteBox with drop-ins, or static ND filters threaded to the front.

    The ND throttle is not a 'must have' tool, but a really good 'convenience' tool. I was able to switch through a variety of FD glass without worrying about step up filters to match the different size glass.

  4. David

    @Emm Definitely. Thanks for sharing the Fotodiox take on it. I'm eager to try both. The ability to flick the ND off completely (like the HolyManta) is really great. But for me it has to be a good deal better then the ND Throttle optically for it to worth 200 USD more.

  5. David

    @David Peterson
    Apparently there is a HolyManta VND Nikon - MFT in the works. They told me in an e-mail. They didn' say when it will be available, though.

  6. George, if you look up holymanta website, they are reporting theirs work with full frame. So you might consider getting them instead? Would be worth it.

    As for lenses, I'd lean heavily towards getting Nikon F mount lenses over Canon EF, as they're more usable and "future proofed" for whatever technology is the next corner.

    Though you'd have to use another Nikon F to Canon EF adapter on top of the holymantra.

  7. George

    Hi again,
    I'm planning on buying the EF Rokinon's because obviously it would be a safer bet in terms of selling them off if need be because people don't tend to have Sony E mount lenses... Any thoughts?

  8. George

    Hi Emm,
    Just wondering if this adaptor would work for my a7s that I was telling you about a couple of days ago?
    If not, then what ND filter would work? I am looking at getting EF Rokinon Cine lenses so if this ND filter adaptor works then I'm all set.
    Please correct me and guide me in terms of my decisions! Thanks

  9. I put 77mm step-up rights on all my lenses. I buy one variable ND filter, and a bunch of generic 77mm lens caps. Many problems solved.
    The "dots" pattern or polarization of whatever happen in the filter is made as small as possible so not to interfere with the image. If you are looking through a big piece of that glass the pattern is relatively small. If you are only using 1/2 the area of glass (behind the lens) the pattern would theoretically be more prominent. But, where it falls in the focal plane could matter more. i guess we'll see.

  10. Brian FitzGibon

    @Emm. So it is, how stupid of me. I just blindly followed a link. It would be nice to see some reviews of it, though. Such a great idea if it really works...

  11. Emm

    Post author

    @Brian - That's a totally different product. That is not a Variable ND Filter Lens Mount.

  12. I agree that systems like this need a no ND setting. for event shooting where one is constantly moving between indoor and outdoor, it's bad to get stuck with ND on in dim light.

  13. Emm

    Post author

    @David Kessler - Yes, definitely for manual lenses, but there are many available from Zeiss, Rokinon, etc. They would all still require ND filters outdoors so it's still useful. I'm curious if this has any different effect that other ND filters have when shooting long focal lengths. Variable ND filters can affect sharpness after 85mm, but by placing it behind does it have the same effect?

  14. I like it. Would like hear more about the quality. I spent $200 on a variable ND by Hoya for their reputation. Don't know much about optics from Fotodiox other than the FD adapter I own.

  15. @Jeremy, it would intercept the communication and moreover would not allow using the Metabones anyway -- this only works by filling in the flange distance spacer of an E-mount to Canon EF adapter with its ND filter. Same for, which also has an MFT adapter of this sort.

  16. I really like this idea but it would be much better suited towards manual lenses. This not being a smart adapter, you will not have control of the lenses actual aperture. Make it for MD or FD lenses and I'm in. To answer the comment above, you will not be able to use this along with a metabones adapter (there wouldn't be anywhere for it to go)

  17. Notably, this isn't quite as practical as the HolyManta which has the better option of completely flipping away the ND filter as necessary, for maximum clarity when an ND filter isn't (momentarily) necessary.

  18. just got the fs100 and this sounds good, i'm curious if it will have any affect on the communication between the lens and the metabones adaptor? also any color tinting with it?

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