Metabones Speed Booster Ultra 0.71x Adapter for Minolta MD-Mount Lens to Micro Four Thirds-Mount Camera

Metabones Speed Booster Ultra 0.71x Adapter for Minolta MD-Mount Lens to Micro Four Thirds-Mount Camera

Metabones Speed Booster Ultra 0.71x Adapter for Minolta MD-Mount Lens to Micro Four Thirds-Mount Camera

B&H # MEBSPMDM43BM MFR # MB_SPMD-M43-BM3
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Product Highlights

  • Minolta MD Lens to Micro 4/3 Body
  • Full-Frame Lens to Micro 4/3 Camera Body
  • 0.71x Micro 4/3 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 Minolta MD-Mount Lens to Micro Four Thirds-Mount Camera from Metabones allows a Minolta MD-mount lens to be mounted onto a Micro Four Thirds-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 Micro Four Thirds-sized sensor, it would project an image larger than the Micro Four Thirds 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 Minolta MD-Mount Lens to Micro Four Thirds-Mount Camera condenses the light from a lens designed for 35mm film or "full frame" camera sensors and projects it onto a Micro Four Thirds sensor. This allows a Micro Four Thirds 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 1/4"-20 threads as well as compatibility with Arca-Swiss tripod heads.

The Speed Booster Ultra 0.71x Adapter for Minolta MD-Mount Lens to Micro Four Thirds-Mount Camera does not support electronic communication between an attached camera and lens. To help determine the amount of light that enters a Micro Four Thirds-mount camera when using this adapter and a Contax/Yashica-mount lens, users should use the aperture ring found on the lens.

  • Allows a full-frame Minolta MD-mount lens to be used with a Micro Four Thirds-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 Minolta MD-Mount Lens to Micro Four Thirds-Mount Camera
  • Front Cap
  • Rear Cap
  • Tripod Foot Key
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
    Compatibility Minolta MD-mount lens to Micro Four Thirds-mount camera
    Crop Factor 0.71x
    Groups/Elements 4 / 5
    Length Not specified by manufacturer
    Weight Not specified by manufacturer
    Packaging Info
    Package Weight 0.75 lb
    Box Dimensions (LxWxH) 4.3 x 4.2 x 2.4"
    Speed Booster Ultra 0.71x Adapter for Minolta MD-Mount Lens to Micro Four Thirds-Mount Camera is rated 1.0 out of 5 by 1.
    Rated 1 out of 5 by from could not mount it on my OM-D E-M1 mark 1 I actually got two of these from B&H, one replacing the other.� Neither could be mounted on my Olympus OM-D E-M1.� They would mate with the camera body, but couldn't be turned more than about 3 or 4-degrees.� After that they would seize up.� I was advised to removed the foot for the tripod, but this wasn't in the way of anything and there was no improvement when it was removed.� Metabones includes some tools to remove fasteners.� I contacted Metabones directly and, after some delay (which lead to replacement rather than waiting for a resolution) I was told they don't have an OM-D E-M1 to test with.� Wish I hadn't purchased such a fringe model of camera.� Both samples of the Speed Booster failed in the same way, while my Olympus and Panasonic lenses mount and work just fine, as do my numerous $15 adapters for Minolta lenses.� The Speed Booster doesn't hit the pseudo-pentaprism, either, and I couldn't tell where else it might be hanging up.� You can have a look at the attached photo collage to see if you can identify what might have been getting in the way.� On the Minolta side, lenses could mate, but turning those Minolta lenses so they locked was difficult.� I was concerned that if I were to change lenses a lot there'd be a lot of scraping, metal filings, or removal of plating.� The FAQ at Metabones says they design for a firm lens mount (for video purposes) and you can soften this grip by disassembling the adapter on the Minolta side and distorting the retaining springs.� When I looked into how to do that online (Metabones orphans you at this point, even though this is when you are first trying to use the product), I found a write-up on how someone else did it for other lenses.� In that write-up I saw these springs would fall out when the adapter was reassembled, unless tacked on with some grease.� Really?� I don't buy the story about the firm lens mount for video, but I'm not a video guy.� The feeling I get is these springs may soften over time, so they are made to start out stiff, but what do I know?� I can't even turn the adapter so it locks onto the camera body.� I never did hear back from Metabones support when I sent them the same photo collage you can see here.� Metabones is set up to be non-communicative, even though I expressed to them that I didn't want to chew through their inventory and would try whatever they suggested.� B&H didn't know but they allow prompt returns.� So all I'm left with is this review.� At least it seems to fit!
    Date published: 2018-03-22
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