Metabones Canon EF Lens to Sony E Mount T CINE Speed Booster ULTRA 0.71x (Fifth Generation)

Metabones Canon EF Lens to Sony E Mount T CINE Speed Booster ULTRA 0.71x (Fifth Generation)

Metabones Canon EF Lens to Sony E Mount T CINE Speed Booster ULTRA 0.71x (Fifth Generation)

B&H # MEMBSPEFEBT3 MFR # MB_SPEF-E-BT3
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Product Highlights

  • Canon EF Lens to Sony E-Mount Body
  • Positive-Lock Canon EF Lens Mount
  • Increases Angle of View by 0.71x
  • Increases Maximum Aperture by 1 Stop
  • Switch for In-Body Image Stabilization
  • Smooth Iris with Select Adapted Lenses
  • Support for Phase- & Contrast-Detect AF
  • Programmable Fn Button; Status LED Light
  • Weather-Resistant Rubber Mount Gasket
  • Compatible with Sony PXW-FS7 Mark II
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Metabones MB_SPEF-E-BT3 overview

  • 1Description

Realize the full potential of your full-frame Canon EF-mount glass on your APS-C and Super35 format Sony E-mount cameras with this Metabones EF to E Mount T CINE Speed Booster ULTRA 0.71x. Utilizing advanced optics, this adapter will increase the apparent angle of view of your full-frame lens by 0.71x, effectively combating the crop factor of an APS-C camera. This also increases the apparent sharpness of your image while also increasing the maximum aperture by 1 stop, making your full-frame lens look as if it were mounted on a full-frame camera.

This cinema-styled electronic adapter features a positive-lock lens mount that will ensure that your adapted lenses are secure. Further improving on previous generations of Smart Adapters, this fifth-generation model now features a rubber gasket to protect the camera's mount from dust and moisture, offers a status notification LED light to check operation modes, and a dedicated switch that controls in-body image stabilization of select cameras. Also, this version is compatible with the Sony PXW-FS7 Mark II video camera.

This adapter is equipped with numerous capabilities thanks to the use of a high-performance 32-bit processor. The features include support for both phase-detect and contrast-detect AF systems as well as the ability to control the aperture from the camera body. Smooth iris effects are possible as well on select lenses and 5-axis stabilization is available thanks to communication of distance information with supported lenses. Also, it features a programmable function button, enables electronic (focus-by-wire) manual focusing, transmits Exif data to the camera, and works with in-lens image stabilization. Additionally, distance and zoom is displayed on certain camcorders and mirrorless cameras, auto magnify can be enabled, and it can automatically switch into APS-C mode depending on the lens used.

Beyond electronic communication, the adapter has many physical advantages as well, such as a black felt flocking on the inside of the adapter that prevents reflections. For larger lenses, there is a removable Arca-type compatible tripod foot with a 1/4"-20 thread on the base.

Allows users to adapt a full-frame Canon EF-mount lens to an APS-C/Super35 Sony E-mount camera or a full-frame camera in APS-C mode.
Advanced 5 element in 4 group optical construction uses ultra-high index tantalum-based glass that increases the angle of view of a full-frame lens by 0.71x and increases the maximum aperture by 1 stop. This effectively compensates for the 1.5x crop factor of APS-C cameras and provides an image similar to that of a full-frame lens on a full-frame camera.
Positive-lock lens mount provides extra security when attaching large lenses.
Electronic contacts permit transmission of data between the lens and camera enabling autofocus, auto exposure, image stabilization, aperture control from the camera body, saving Exif information, and more.
Status notification LED light on the adapter will show the user what mode the adapter is currently in.
Dedicated switch for controlling in-body image stabilization.
Programmable function button for rapid access to commonly used settings and features.
Support for phase-detect AF with the a7R II, a7 II, a6500, and a6300 cameras.
Compatible with Sony PXW-FS7M2 (FS7 Mark II) camera.
Smooth iris support with select Canon (2009 and later), Tamron (SP series 2013 and later), and Sigma (2016 and later) lenses.
Enables electronic manual focusing on lenses, such as the Canon EF 85mm f/1.2L II, that use a focus-by-wire system.
Support for distance and zoom display, auto magnify, and auto APS-C Size Capture settings on select cameras.
Internal felt flocking prevents reflections.
Removable Arca-type compatible tripod foot with 1/4"-20 thread.
Powered by camera body.
In the Box
Metabones Canon EF Lens to Sony E Mount T CINE Speed Booster ULTRA 0.71x (Fifth Generation)
  • Front Cap
  • Rear Cap
  • Tripod Foot Hex Key
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Metabones MB_SPEF-E-BT3 specs

    Adapter
    Camera Mount Sony E (APS-C)
    Lens Mount Canon EF
    Magnification 0.71x
    Optical Design 5 Elements in 4 Groups
    Physical
    Dimensions H: 3.6 x W: 3.5 x D: 1.0" / H: 9.1 x W: 8.8 x D: 2.7 cm
    Weight 8.5 oz / 242 g
    Packaging Info
    Package Weight 0.95 lb
    Box Dimensions (LxWxH) 4.8 x 4.7 x 2.4"

    Metabones MB_SPEF-E-BT3 reviews

    Canon EF Lens to Sony E Mount T CINE Speed Booster ULTRA 0.71x (Fifth Generation) is rated 3.9 out of 5 by 7.
    Rated 4 out of 5 by from It does everything I need it too. This is being used with my Sony Fs5 with a mixture of Canon andTamronglass. I cant and wont comment on the auto focus as I manual focus and don't really expect good video auto focus anyway. What is important to me is quality of my image and compatibility with my lenses. Does it work with all my lenses: Yes. The stabilization all works and I am able to change the aperture seamlessly. Does it effect my image quality: My image is still very sharp to my eye and tested against another brand of focal reducer my image is sharper with theMetabones. Do I get the extra stop of light: Yes. My F4's goes to 2.8 and my F1.8's go down to 1.3 on my camera body. So it does everything I expected it too so I'm happy. The locking ring does take a little getting used to but it locks the lens tight and there is zero play between lens/adapter/camera body. It is very much a two handed operation now so it does take a bit of patience. Overall I am happy with the purchase. :-)
    Date published: 2017-03-19
    Rated 2 out of 5 by from Using with Sony A7R II - all variety of issues I bought this 5th Gen along with a new Sony A7R II. I've been using Canon 5D mkII and mkIII for the last 7 years doing video and photography. As an FYI on the A7RII, nothing about the Sony menu system will feel intuitive to Canon EOS users. So, getting the A7R II set up the way you like to shoot will take some time, particularly if you're a video shooter. The Metabones is real solid construction. It fits very tightly on the Sony body, which is a good thing as it's bound to wear just a little over time. Mounting the lens is tricky. It's hard to find the insertion slot to get it to seat flush. Then, the Lock slider is pretty tight and takes some two-hand coordination to make sure it's seated flush while you slide the Lock ring. I was afraid I'd drop the lens. It might be best to mount the lens on your lap or over a soft case to avoid the drop risk. When it does mount, it's pretty tight. It seats close to the camera body, resulting in a very tight space where you want to wrap your fingers around the right hand grip. You have to split your grip holding the camera with 2-3 fingers. All of these things are manageable, only slightly annoying. I rented the 4th Gen a couple months back along with the A7R II for a video shoot at a dueling piano bar. There's a wide range of light exposures in a music/entertainment venue... a challenging shoot by any measure. The Sony A7R2/metabones/Canon 70-200mm yielded some real quality imagery. The exposure as shown in the on-board monitor and in the viewfinder seemed to match up fine in this instance (in Movie mode on the A7R2). In testing the Metabones Gen 5 in the studio today the exposure did not match up with any of the lenses I had available (most of my lenses were out on a shoot). I messed with the camera settings, but still couldn't get it right. The 'Live View Display' (On & Off) went from too dark to too bright in both the monitor and in the viewfinder. The lenses I used were Rokinon Cine 24mm & 35mm and Canon 24-105mm. The obvious problem here is you can't see to focus. As I was writing this, I picked up the camera again and this time, the exposure was correct. Nevermind that I'd turned the camera on and off a dozen times and mounted/unmounted lenses in the course of my first test shoot and couldn't get a comparable exposure. And that's the thing with the metabones, it's very unpredictable. I tried Manual and Movie modes. I haven't used the Metabones enough to develop a comprehensive list of all the quirky things you might experience with it, but here's a few: Occasionally (fairly regularly), the camera will go blank screen and no buttons work. Turning it off then on didn't fix it. I had to remount the lens each time to get it out of it's locked up state. I experienced this at the music venue shoot as well. You will be mounting/unmounting lenses periodically. Another thing was at 6400 ISO, the screen and viewfinder would get a really pronounced color noise. Once again requiring remounting the Canon 70-200mm lens. I lost an important shot as a result. If I recall, the recorded video clips had the same appearance. The color noise only happened at 6400 ISO. After a few tries, I gave up on 6400 ISO. On my 5D mkIII, shooting at 6400 ISO is no problem and looks quite good, almost magic really. As for the auto-focus with Canon lenses, I shot all manual focus at the music venue so I didn't test it on that occasion. I did however test it in the studio today, on a tripod, with my Canon 24-105mm. It was awful attempting to find focus, settling on something wildly out of focus each time. Infrequently, after searching near and far focus for about 3-4 seconds, it would lock on to the spot focus point. This is only my first test and the only AF lens I had available. The metabones being quirky, perhaps I'll have better luck next time or with another AF lens. I was hoping that the Gen 5 would resolve some of what I experience with the Gen 4 I rented, but perhaps not. I'm trying to figure out whether this rig is gonna be workable as a video rig. Obviously, the A7R2 is not an ideal video rig, but people do use it as such and it gets a lot of strong reviews for that purpose. Just a fair warning that if you're looking for the Metabones as a be-all/end-all, working seamlessly with your Canon Zooms and Primes, there's a chance you'll be frustrated and disappointed. I'm not giving up on it quite yet cause realistically, I can't afford the rig I really want.
    Date published: 2017-03-13
    Rated 5 out of 5 by from A must for FS7 users. Love it! Solid hold on Canon 70-200mm. Don't need extra support. If you have a Shape A&sII cage, it won't be compatible unless you do some strategic metal grinding on the cage and the Metabones support and the cage's support plate for the lens adapter. But once that all done, VERY SOLID!
    Date published: 2017-03-29
    Rated 5 out of 5 by from Love this unit Having this unit allows us to use our EF Lenses AND ADDS almost a stop. It does NOT crop the image. The only thing is, when you power cycle the camera, the focus will not be in the spot you left it. But youve powered cycle, take the second to check your focus
    Date published: 2018-06-19
    Rated 5 out of 5 by from Solid connection and durable Positive Lock connects the lens very solid, but you need two hands to attach the lens. Works very well on the FS7 but feels a little to big for the tiny A6500. Great optical and software quality. Works great with all my Zeiss ZE Primes.
    Date published: 2017-05-23
    Rated 2 out of 5 by from Not what was expected... Canon L series F2.8 lenses attempt to reach F2.0, auto focus unusable because of noise and jerk, if you are fully manual with a puller the unit does amplify a little more light, speed remains the same.
    Date published: 2017-03-20
    Rated 4 out of 5 by from Great mount This is another great mount adapter from Metabones.� The build is terrific.� The mount to the camera (my Fs5) is solid.� The mount to the lens is also very solid.� All in all a great tool in the tool bag. But...� The unit(s) I bought were too tight with a few of my Canon EF zoom lenses.� I could never get my 24-70 f2.8L to mount and the ring to lock.� My 16-35 f2.8L and 70-200 f2.8L worked alright with a little effort.� I returned the first unit to B&H and they were, as always, awesome about issuing an RMA.� I asked for a replacement and had virtually the same issue with the second unit.� As I occasionally shoot with client's lenses in addition to my own I didn't want to roll the dice on each shoot.� I returned the second unit with out any issue.� I will wait a short while and try again in case it was a few bad units. When I tested with my working lenses the image was sharp and clear.� The extra stop of exposure was very welcome.� And as I bounce back and forth from my 5D3 rig to my Fs5 rig I like the almost matching field of view when choosing a camera for a job. I'm looking forward to adding this adapter to my bag of tricks and will post an update once I've received my new one. Good shooting!
    Date published: 2018-05-31
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