Metabones Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera

Metabones Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera

Metabones Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera

B&H # MESPAXBM2 MFR # MB_SPA-X-BM2
Metabones Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera

Metabones Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera Back View

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Product Highlights

  • Sony A-Mount Lens to Fujifilm X Body
  • Full-Frame Lens to Fujifilm X APS-C Body
  • 0.71x APS-C Crop Factor Compensation
  • 1-Stop Increase in Lens Apertures
  • 5 Optical Elements in 4 Groups
  • Locking Mechanism to Secure Lens
  • Push-Button Lens Release
  • Brass Mounting Rings
  • Detachable Tripod Foot
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  • 1Description

The Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera from Metabones allows a full-frame Sony A-mount lens to be mounted onto a Fujifilm X-mount camera. While doing so, the adapter's optics help to maximize the connected lens's apparent angle of view while providing a 1-stop increase for the camera over the lens's aperture range.

If a lens intended for 35mm film or similarly sized full-frame camera sensors is connected to a camera with a Fuji X-mount APS-C-sized sensor, it would project an image larger than the Fuji X-mount APS-C sensor was built to accept. Able to capture only the center portion of the projected image, the effective angle of view of the lens would be narrowed, creating an in-camera "crop factor." The Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera condenses the light from a lens designed for 35mm film or "full frame" camera sensors and projects it onto a Fuji X-mount APS-C sensor. This allows a Fuji X-mount APS-C sensor to utilize more of the light gathered by a connected lens, which effectively reduces the crop factor while making available to the sensor an additional 1 stop of light for each of the lens's f/stop settings.

This adapter is constructed from aluminum alloy for durability while minimizing weight and its mounting rings are made with brass to further prevent wear-and-tear. Inside are five lens elements in four groups that are designed to provide optical clarity as well as color fidelity, and a detachable tripod foot is included that features 3/8" threads as well as compatibility with Arca-Swiss tripod heads.

The Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera does not support electronic communication between an attached camera and lens. To help determine the amount of light that enters a Fujifilm X-mount camera when using this adapter and a Sony A-mount lens, an aperture dial is built into the Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera.

  • Allows a full-frame Sony A-mount lens to be used with a Fujifilm X-mount camera
  • Maximizes apparent angle of view of combined camera and lens
  • Provides a 1-stop increase for the camera over the lens's aperture range
  • Five lens elements in four groups for optical clarity as well as color fidelity
  • Detachable, Arca-Swiss compatible tripod foot with 3/8" threads
  • Aluminum alloy components for weight reduction
  • Brass mounting rings prevent wear-and-tear
  • Locking mechanism for secure attachment of lens with push-button release
In the Box
Metabones Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera
  • Front Cap
  • Rear Cap
  • Tripod Foot Key
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
    Adapter
    Camera Mount Fujifilm X
    Lens Mount Sony/Minolta A
    Magnification 0.71x
    Optical Design 5 Elements in 4 Groups
    Physical
    Material Not Specified by Manufacturer
    Dimensions : 2.6 x D: 1.1" / : 6.5 x D: 2.8 cm
    Weight 7.4 oz / 210.0 g
    Packaging Info
    Package Weight 0.8 lb
    Box Dimensions (LxWxH) 4.3 x 4.2 x 2.4"
    Speed Booster Ultra 0.71x Adapter for Sony A-Mount Lens to Fujifilm X-Mount Camera is rated 4.0 out of 5 by 1.
    Rated 4 out of 5 by from Minolta lenses come to life again I'm a long time Minolta/Sony guy, who recently switched to Fuji (the X-T1). The challenge was to use my collection of prime lenses built up over 20 years, on the Fuji. This adapter is shockingly expensive, however I tried it in the shop along with the Novoflex (half the price), and the Metabones seemed better built, not to mention the benefits of focal length conversion. In short: it works great. Your lenses behave almost exactly as they once did on a full-frame SLR in manual focus mode. While I was concerned about adding glass, this turned out not to be an issue. There is an aperture scale on the top, which is of nominal use as it doesn't usually indicate the real aperture, since they are equally spaced from f/1 to f/8. I'll explain why, as I compare my Minolta lenses with Fuji's equivalents. 1) 35mm f/2. With the aperture set to f/2, the camera sets the same shutter speed as if the lens was really open to f/2 (based on separately metering the scene). So far so good. Set to f/3 and you get close to real f/3 metering. However continue to f/6 and by that time the real metered value is f/8. Now the other direction: selecting f/1 on the Metabones aperture ring gives a shutter speed that indicates it's really open to roughly f/1.6 (in my unscientific test). This makes sense - f/1 and f/2 are almost two stops apart, so basically the labels on the aperture ring are incorrectly marked using a linear scale. However, notice I was able to seemingly open this lens wider than its original maximum! This is really cool. Moreover, when compared with Fuji's 23mm prime, the field of view (FOV) is almost identical - very, very slightly zoomed in - on account of the 0.71x crop factor which almost exactly balances out the 1.5x crop factor of the Fuji body. And before you ask - there is no distortion, parallax effect, or loss of quality! So this acts exactly as it was on my film SLR all those years ago. 2) 50mm f/1.7. I compared this to the Fuji 18-55mm kit lens, zoomed to 35mm. Again, the FOV was almost identical. At narrower apertures, the prime was marginally sharper with similar bokeh. However at f/3.6 there is no comparison - being the maximum aperture of the zoom it's at its lowest quality, whereas the prime still has two more stops to go. This is where the lens adapter really shows its value: if you routinely shoot at wide apertures, it quickly becomes expensive to upgrade all your prime lenses, and a single zoom isn't going to cut it. Wide open, I was capturing about as much light as if it were an f/1.2 lens (neat!), and stopping down, the aperture ring mostly showed a value about a full stop slower than reality - e.g. f/4 on the ring meant f/2.8 when metered separately. 3) 85mm f/1.4. My all-time favourite lens, gently gathering dust. It didn't disappoint. With close to the same FOV as the Fuji zoom at 55mm, it's a fair bit warmer too (a distinction eliminated by Lightroom's auto white balance). Again - at f/4 (the maximum aperture for the zoom) there is no comparison in terms of sharpness, both for closeups and distance shots: the 85mm is far superior. However I was surprised for a distance shot (buildings across the street), by f/8 it had lost its edge: a testament to the quality of the Fuji kit lens. At maximum aperture, this metered around f/0.8 - so, combined with Fuji's remarkably low-noise high ISO modes, this lens will shine in near darkness. Between f/5-f/8 the actual aperture was about a stop wider than shown on the scale. 4) 70-210mm f/4 beer can. Worked perfectly too: this is where the built-in tripod mount came handy, so the weight of the (surprisingly light) Fuji mirrorless body balanced that of the lens. Fuji has a fantastic critical focus mode, which was essential at the longest focal length. Remember to switch the camera to manual focus (and turn off face detection), which allows you to rotate the rear dial after pressing Focus Assist to get an even closer zoom. The extra free stop of light really helps, as this lens isn't a particularly fast one - it metered at f/2.8 on both ends of the zoom range, which if you compare with the price and weight of a constant f/2.8 zoom, such as the XF 50-140mm, more than pays for the adapter - although of course you don't get OIS not to mention AF. For this lens, add 1 and 1/3 stops to the scale (instead of subtracting) to get the approximate real aperture value. For such a high price, the only feature I could wish for is the ability to pass through aperture and lens data to the body. In the EXIF, the aperture is always f/1 (regardless of the setting), and if you at least want to remember which lens you used, you must first manually set the focal length in the appropriate camera menu. That said, if you mostly use this for one lens, the camera will remember and you don't have to keep setting it after mounting the adapter. Last point: the adapter is a VERY tight fit to the body. In the shop they initially felt it was faulty because we couldn't twist it on. I've taken it on and off a few times, it gets a little easier, and there's no danger of damaging the metal mount. The lenses go on more easily, yet are securely mounted. If I only had one old prime lens, I'd sell it and put it towards the cost of an equivalent Fuji prime. More than that - if you don't mind MF, this is a solid piece of kit to preserve your investment.
    Date published: 2016-05-21
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