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

SKU: MBSPLRM43BM3 MFR: MB_SPLR-M43-BM3
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Key Features

  • Maximize your MFT camera with this Leica R lens adapter, boosting light!
  • Get a wider field of view; the 0.71x crop factor enhances your Leica R glass.
  • This Metabones Speed Booster maintains superb image quality with Leica R lenses.
  • Capture stunning photos and videos using your Leica R lens on Micro Four Thirds.
  • Robust build quality ensures secure and reliable lens mounting every single time.
  • Enjoy sharper images; this lens adapter optimizes your Leica R lens performance.
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Special Order?Estimated to Ship: 08/20/2025
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Questions & Answers

Francisco A : Hello, I want to buy the Leica R to MFT SpeedBooster ULTRA, to use mainly with Elmarit 28mm and Elmarit 35mm on the BMPCC4K. I'd like to know if these two lenses will be compatible with this SpeedBooster? Going through the Metabones website I saw that neither the EF to MFT ULTRA nor the XL will be compatible with these lenses (they need modification). I also read that they won't be compatible with the Leica R to BMPCC 0.58x nor the 0.64x.  That made me wonder if these lenses will be fully compatible with the Leica R to MFT ULTRA, although at the description there's no mention of any Leica R lens restriction.  Thank you very much!
Francisco A : Hello, I want to buy the Leica R to MFT SpeedBooster ULTRA, to use mainly with Elmarit 28mm and Elmarit 35mm on the BMPCC4K. I'd like to know if these two lenses will be compatible with this SpeedBooster?  Going through the Metabones website I saw that neither the EF to MFT ULTRA nor the XL will be compatible with these lenses (they need modification). I also read that they won't be compatible with the Leica R to BMPCC 0.58x nor the 0.64x.  That made me wonder if these lenses will be fully compatible with the Leica R to MFT ULTRA, although at the description there´s no mention of any Leica R lens restriction.  Thank you very much!

Reviews about this item

Review Summary

2021-01-15T06:08:31

Rated 5 out of 5

Awesome Product

Works perfect. Great to be able to expand the glass I have the ability to use for my GH5.

JANET S.

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Metabones Speed Booster Ultra 0.71x Adapter for Leica R-Mount Lens Specifications

  • Compatibility

    Leica R-mount lens to Micro Four Thirds-mount camera

  • Crop Factor

    0.71x

  • Groups/Elements

    42465

  • UPC Code

    4897050181782

Models
Metabones Speed Booster Ultra 0.71x Adapter for Leica R-Mount Lens
$449.00

Special Order

Generally ships in 7-14 days, subject to availability

Zeiss Interchangeable Mount Set (IMS) for CP.3 100/T2.1 Lens - Micro 4/3 Mount
$430.00

Special Order Item

This item typically ships within 1-2 Weeks. Delivery is subject to availability.

Venus Laowa 0.7x Focal Reducer for 24mm f/14 Probe Lens, Canon EF to MFT
$250.00

Pre Order Now

You may place this on order now and it will be shipped on a first come first serve basis. We do not charge your card until we actually ship.

FeaturesSpeedBooster / BaveyesInterchangeable Mounts-
Camera Fitting (Male)Micro Four ThirdsMicro Four ThirdsMicro Four Thirds
Lens Fitting (Female)Leica RZeiss CP.3Canon EOS EF

About Metabones Speed Booster Ultra 0.71x Adapter for Leica R-Mount Lens

FEATURED REVIEWS

Awesome Product

By JANET S.

Works perfect. Great to be able to expand the glass I have the ability to use for my GH5.

Under the meticulous craftsmanship of Metabones, the Speed Booster Ultra 0.71x Adapter emerges as an essential tool for photographers and videographers aiming to maximize the performance of their Leica R-Mount lenses on Micro Four Thirds-mount cameras. This precision-engineered adapter not only facilitates the attachment of a wide array of Leica R lenses to MFT cameras but also enhances the lens speed and field of view.

The adapter's advanced optical design includes five elements in four groups, incorporating ultra-high index tantalum-based glass for superior clarity and sharpness. The 0.71x magnification factor effectively reduces the crop factor of Micro Four Thirds cameras from 2.0x to 1.4x, thereby expanding the angle of view and increasing the maximum aperture by 1 stop. This means your f/2.8 lens now performs like an f/2.0 lens, capturing more light and enabling shallower depth of field.

Built with precision and durability in mind, the Speed Booster Ultra features a robust metal construction that ensures a secure and solid connection between the camera and lens, maintaining electronic communication for autofocus and aperture control. The adapter's matte black interior minimizes internal reflections, while its removable tripod mount helps to balance heavy lenses and provides additional support.

The Metabones Speed Booster Ultra 0.71x Adapter is a game-changer for Leica R-Mount lens owners who use Micro Four Thirds cameras, offering enhanced functionality without compromising on image quality. Whether shooting stills or video, this adapter is designed to unlock new creative possibilities and breathe new life into classic lenses.

Metabones Speed Booster Ultra 0.71x Adapter for Leica R-Mount Lens Features

  • Specially designed for Leica R-Mount Lens to Micro Four Thirds-Mount Camera

Warranty Information

This product has a limited warranty of 12 months.

Key Features

  • Maximize your MFT camera with this Leica R lens adapter, boosting light!
  • Get a wider field of view; the 0.71x crop factor enhances your Leica R glass.
  • This Metabones Speed Booster maintains superb image quality with Leica R lenses.
  • Capture stunning photos and videos using your Leica R lens on Micro Four Thirds.
  • Robust build quality ensures secure and reliable lens mounting every single time.
  • Enjoy sharper images; this lens adapter optimizes your Leica R lens performance.

What's in the box:

  • Metabones Speed Booster Ultra 0.71x Adapter
  • Front Cap
  • Rear Cap
  • Tripod Foot Key
  • Metabones 1 Year Limited Warranty