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Metabones T Speed Booster Ultra 0.71x Adapter for Canon EF Lens

4.617 product ratings
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About this product

Product Identifiers

BrandMetabones
MPNMBSPEFM43BT4
GTIN4897050181850
ModelT Speed Booster Ultra 0.71x Adapter
eBay Product ID (ePID)21027564822

Product Key Features

TypeLens Adapters
Lens FittingCanon EF, Micro Four Thirds

Dimensions

Weight5.8 Ounces

Additional Product Features

To FITCamcorder, Camera
Modified ItemNo

Ratings and reviews

Learn more
4.6
17 product ratings
  • 14 users rated this 5 out of 5 stars
  • 1 users rated this 4 out of 5 stars
  • 1 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 1 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 11 reviews
  • by 5104spencer
    12 Jan, 2020Most favourable review

    Game changing!

    Really amazing device, turns the 1.9 crop factor of BMPCC4k into a 1.35 crop, that's better than APS-C/super 35. The only reason I do not do 5 stars is that on my Sigma 18-35 there is vignetting on the wide end. After all my research, I was not aware of this. The Ultra version can accept full frame EF lenses, I am new to EF so I just didntt factor that in. With the vignette I lose about 3 mm on the wide end because I think it's bad enough. Aside that, actually really pleased that my 4/3 sensor is now "bigger" than super 35.

    Verified purchase: YesCondition: Pre-owned

  • by deanmeistr
    22 Oct, 2016Most critical review

    It's good..but complicated

    The unit has great benefits if you have high-end EF lenses that you want to use to get pro film results: particularly highly detailed images that Canon EF lenses are famous for, beautiful bokah, and the benefit of added stops to be able to play with light, especially low light situations that you do not want to try and push a camera's ISO. So, there are multiple benefits, and the quality of the glass and construction are excellent. HOWEVER: apparently a recent firmware update for the Speed Booster has sent the electronics into a tizzy when used with the Panasonic GH4; adjusting the aperture may cause the camera to completely lock, requiring you to remove the camera's battery as the only way to unlock it from the hang. There's no complete rhyme or reason when or why it will happen, and people mentioning it on discussion boards have reported no help from Metabones. So, I cannot recommend it without great caution, as you might be in the middle of a shot and the camera will completely lock. I haven't dared to use it with the YAGH, as that required taking the unit partially apart just to get it to fit a lens on, and I don't want to keep plugging in and unplugging the unit.

    Verified purchase: YesCondition: Pre-owned

  • by incognito80
    04 Aug, 2021

    A must have for any MFT camera!

    Metabones’ optical quality is fantastic, and that’s the most important aspect of a device that you have to place between your lens and camera sensor. On top of it, this speedbooster makes the MFT sensor way more usable and closer to a Super 35mm sensor size (slightly wider). Worth the high price tag.

    Verified purchase: YesCondition: Pre-owned

  • by wilbuswilli
    12 Aug, 2020

    Excellent Adapter

    Not going to be as good as a straight E-Mount lens but this gets the job done well!

    Verified purchase: YesCondition: Pre-owned

  • by krsm_42
    24 Mar, 2020

    Works Well With My BMPCC4K

    no problem when pared with my bmpcc4k. thought I would have needed the bmpcc4k version but this version of the speed booster works as well as far as my personal experience.

    Verified purchase: YesCondition: Pre-owned

  • by aleaguil2
    13 Jul, 2021

    Stellar! Stunning! Why don't these adapters get Oscars?

    adjusts my EF lenses very well

    Verified purchase: YesCondition: Pre-owned

  • by yuseonk_0
    07 Feb, 2019

    Fast

    Very Good

    Verified purchase: YesCondition: New

  • by cossjesus_6
    16 Dec, 2022

    Great product

    Amazing adaptor for bmpc

    Verified purchase: YesCondition: Pre-owned

  • by shakecochise
    20 Jul, 2021

    Metabones

    Works great

    Verified purchase: YesCondition: Pre-owned

  • by flyfisher_2014
    20 Aug, 2020

    EF

    Unsharp, not working with every EF lens.

    Verified purchase: YesCondition: Pre-owned

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