Lens Turbo II Review By Henrik Kristensen

Lens Turbo II Review

By Henrik Kristensen

Hi My name is Henrik Kristensen, and I am so lucky to be able to share my work on this amazing site. English is not my strongest, so hope it’s not to bad – Feel free to ask is there is any doubt. Got a small Danish camera site (Kameravalg.dk), and recently received the brand new Lens Turbo II adapter, and want to share my experience with it. Its pretty much a cheap Metabones adapter, thats turn your APS-C Sony NEX camera into full frame – Or that’s what the ad tells you 🙂 … It will provide 0.726x magnification and increase aperture by 1 f-stop, using Canon EF lenses on the Sony E-Mount platform.


The setup:

I’m a hobbyist photographer, and often just use “Auto” settings, so this review was quit a challenge, since this is a 100% manual adapter with no electronic.

To start with this is my setup:

– Sony NEX-3N mirrorless

– Canon 24-105L f4 lens (Rentet)

– Lens Turbo II adapter – Canon EF to Sony E-Mount

(All pictures have been shot in .jpeg with no editing done)

To show the size and how its work, I made this little film.

And just a single picture, the Canon 24-105L mountet on my Sony NEX-3N with the Lens Turbo II adapter.


Maybe a detail, but on the new version they have removed the red text and made it white – Looks way better + the black and white match the NEX-3N great I think.

The First day:

As told in the top, I have just rented the Canon 24-105L, so the first day was used just to get learn how to manual focus etc. The first test was the range, and with the 0.726x magnification this adapter got, you get pretty close to the Full Frame experience on this point. 



24 vs 105mm, and to me this is a GREAT range when shooting on a daily basis. Is used to my old Sony 18-70mm, and the ~4x optical zoom range fits me very nice.

The adapter is all manual, and these was some of the first pictures I snapped that were in focus 🙂





Second day

Being a amateur photographer and alway use autofocus, the hole “Manual” thing was something I really feared.But there was nothing to fear, the “focus peaking” in the Sony NEX works like a dream, even if you never tried it before. On my NEX the peaking colors are “White, Yellow and Red”, all easy to see on the screen when the subject is in focus. The only problem I found with focus peaking, was that I REALLY missed having a EVF like NEX-6/7 or the A6000. I am sure it will make it much easier to see the focus peaking when the sun is bright, but not a deal breaker.

Lets see at some more pictures:




One of the big problem with the first Lens Turbo, was the corners being soft and not sharp – A pretty big problem to most people. Being an amateur I will let people judge themself, but when compared to pictures taking by the old Lens Turbo, I think the new one is way better.




Another problem with the first Lens Turbo, was an issue called “blue dot” – When shooting in the sun or bright light you could something see a blue “dot” on the pictures. Has only played with the Lens Turbo II adapter a short time, but has not seen this problem in ANY of my pictures  – Really looks like the new coating on Lens Turbo II has resolved this problem.




After 2 days I had to deliver the Canon 24-105L back, and its time to look at the experience. Looking at the quality of the Lens Turbo II, I really got nothing to complain about. Its fit very well, and feels like a quality piece to put on your beloved camera. Is not a big fan of the release button to the lens, but think it’s a minor thing. Not being an expert, I will say that the adapter got a very nice optics performance – They have improved the corner performance compared to the old version, and the “blue dot” issue seems to be total gone.


Using a small house like the NEX-3N I don’t think a bigger lens will be nice to work with, but the 24-105 is just about the right size to me. Using the adapter with focus peaking worked really well, and most people will learn it fast without any problem. It could be nice having a EVF + a bigger grip, but it’s no deal breaker.

Compared to the Metabones it’s almost on par in performance to my eyes, and it only cost 1/3 of the price ! – You don’t get the electronic connection, but with focus peaking it’s not a huge problem, and you can play with all the amazing Canon EF lenses.

It has been really fun to make this review, and it’s not the last time I play with the Lens Turbo II adapter ! … You can buy a Sony NEX-3N + the Canon 24-105L at a decent price second-hand, and the adapter cost around 165 Dollars = You got a very nice setup and a great platform to work with. –

You can see a lot more pictures on my site here:

http://kameravalg.dk/lens-turbo-ii/ (Unboxing)

http://kameravalg.dk/lens-turbo-ii-review-foerste-skud/ (First day)

http://kameravalg.dk/lens-turbo-ii-review-billeder-fim-og-tanker/ (Second day)

Thanks for reading! Regards Henrik Kristensen – Kameravalg.dk

Related Post


  1. Hi, do you know if there is any model of Lens Turbo focal reducer for E mount cameras with E mount lenses? (for use not as adapter but just as a focal reducer).

  2. I am quite new photographer and consider to have LT2 EF-NEX mount for my A6000.
    Since LT2 have no electronic AF and aperture so How do we control aperture or manual focus on EF lens?

    Or Camera just work well with EF lens as manually performance?

    Thank you for great review and comment

  3. I have a sony a3000, and a bunch of manual focus lenses with different mounts (om, m42, PK and MD). I obviously don’t want to buy lens turbos for each mount. Is it possible to get one mount (say EOS–>NEX) and use adapters for OM to Eos, or MD to EOS, etc, or will there be a loss of quality? Also, if using adapters, which turbo mount is the most easily adaptable with other adapters? Thank you for your thoughts.

    • I think only PK can go to EF (or was it the other way around?), so what you’re hoping to do isn’t very feasible. It’s based on the system’s flange distance. You can go from longer to shorter with an adapter (no glass), but not the other way around. But if you can find an adapter on Ebay, then you should able to do it without any loss of quality.

      • You can mount Olympus om, m42, pk, exakta, contax/yashica, Nikon and p6 lenses onto a Canon eos adapter, provided you have the second adapter to go on top e.g. m42 to eos. You can’t mount MD, FD or Konica lenses onto an eos adapter though.

    • You can have an EF version and use adapters for lenses with longer flange distance, like Zeiss C/Y, Nikon, M42 or the like, but no Canon FD or Minolta SR lenses, since their flange distance is too short.

  4. Is there an adjustment for the aperture? I have a cheap passive (no lenses inside) adapter (EOS-FUJI) with a diaphragm control, but it works horrible, what it really does is increase the vignetting.

  5. by the way, the Sony 18-70/3.5-5.6 is a way *bad* Kit Zoomlens design, its optical performance is way poor.
    It also doesn’t make sense to use that lens with the Lens Turbo (either I or Mk. II) because it’s image circle
    is already for APS-C Sensor size only, not covering the full frame image circle either way, so it doesn’t make sense.

    • Hi

      The Sony 18-70mm is mounted on my A200 = A Mount and the Lens Turbo is a E-Mount, so it dont fit at all 🙂 …. Only used the setup to show the size of the small NEX-3N with a large lens mounted on.

      Regards Henrik

  6. Nice Pictures! I’ve the same ML 50/1.4 Lens, and also both the Lens Turbo Mark I & II, both for Contax/Yashica Mount, so i can use my old Contax Zeiss Lenses onto my Alpha 3000 – because
    the Sensor is very good, apart from the other parts of the Body, technically.

  7. Hi

    Thanks for posting this review steve ! – Did the test about 2 months but still have the adapter, is has been thinking about doing some test with a fast prime, 50mm 1.X ….

    Its a all manuel adapter, but at the price point, I think it makes a huge difference, and you got a ton of great lenses to your E-Mount.

    Mounted on the NEX-3N I really missed having a grip like A6000, that would have made a HUGE difference.

    The 24-105mm was not me own, so a lens hood would maybe a made some chances to the contrast – All pictures are taking in .jpeg and NO tweaking after, so the potential is greater than I have shown.

    Henrik – Kameravalg.dk

  8. hi henrik,
    thank you for this useful article.
    it also shows me how versatile and capable the 24-105l is!

    used prices here in austria are between 500 and 600€!

    greetings michael

    maybe you would have needed a good lens hood for contrast?
    or a little tweeking in post pro. but overall impression is really good

    • Roy,

      I have two versions of the Zhongyi turbo booster, one in Leica R and the other for Minolta MD and which I use on my Nex 5N. I could use them on my A7 in crop setting mode, if I wished. Both are the original versions with a circular rear ocular element and which I can see from the MkII listing this is now oblong. This may contribute to improved optical performance at the edges of the frame, and perhaps the new coatings may assist as well.

      In answer to your question is it self-deception (regarding performance) I can say “no” it isn’t, but as you would expect you don’t get owt for nowt, as Yorkshiremen say. (Yorkshire, a County in northern England.)

      Firstly, the field of view does, almost, equal the original FoV of the legacy lens used. This, for me, is the prime reason for using such adapters on APS-C sensors, especially with wide angle lenses.

      Secondly, you do get the extra stop of speed, so any attached lens performs as though it was a stop wider. So my Minolta MD f1.4 becomes an effective f1 for exposure purposes.

      When we look at optical performance, it is with mixed blessings, certainly with my Mk I versions, and can vary depending upon the lens’ optical formulation. Remember, these adapters are generic and are not specifically matched to a particular lens.

      Even though with an APS-C sensor only part of the lens’ imaging circle is used, edge definition at the wider apertures is poor. I’ve found acceptable overall performance doesn’t come in until at around f5.6 to f11 set on the lens, with effective exposure being at f4 to f8. But this is very much lens dependent.

      I’ve only experienced the blue dot issue with one Leica lens (as it was progressively stopped down) but not with any lens on the MD adaptor, rather odd.

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