Metabones Canon EF to Sony E-Mount T Speed Booster ULTRA II 0.71x

Mint Condition

The Metabones Canon EF to Sony E-Mount T Speed Booster ULTRA II 0.71x (quite the mouthful, I know!) is a remarkable piece of optical engineering. Let's break down its features and benefits:

1. Purpose and Compatibility:

   • This adapter allows you to mount Canon EF lenses (originally designed for Canon DSLRs) onto Sony E-Mount mirrorless cameras. It's like introducing a cross-brand friendship in the camera world.
   • Compatible with both full-frame and APS-C Sony E-Mount cameras.

2. Optical Design:

   • The Speed Booster ULTRA II features an advanced 5-element/4-group optical design.
   • It incorporates ultra-high index tantalum-based optical glass. Fancy, right? This glass wizardry achieves extraordinary optical performance.
   • The result? Sharper corners, less distortion, and reduced vignetting.

3. Crop Factor Reduction:

   • The magic number here is 0.71x. When you attach this Speed Booster to your Sony E-Mount camera, it effectively reduces the crop factor.
   • For example, if you're using a camera with a DX-sized sensor (like many Sony mirrorless cameras), the crop factor goes from 1.5x down to 1.07x. More real estate for your shots!

4. Aperture Boost:

   • The Speed Booster ULTRA II increases the maximum aperture of your lens by 1 stop. So that f/2.8 lens suddenly becomes an f/2.0 lens. Brighter images, anyone?

5. Smooth Iris Control:

   • It plays nicely with select adapted lenses, allowing smooth iris adjustments.
   • Compatible with Canon lenses from 2009 onward, Tamron SP series lenses from 2013 onward, and Sigma lenses from 2016 onward.

6. Autofocus Goodies:

   • Supports both phase-detection and contrast-detect autofocus.
   • Fast contrast-detection AF on all E-mount cameras (except AF-S/DMF with Sony A9).
   • Pure phase-detection autofocus on A9, A7RII, A7II, A6500, and A6300 (the fastest).

7. Image Stabilization Harmony:

   • If your lens has optical image stabilization (OIS) and your camera has sensor-shift, in-body image stabilization (IBIS), you get to choose which one to use—or have both work together in harmony.

8. Custom Function Button:

   • There's a programmable Fn button (Focus Hold button) that you can assign to over 50 functions. Aperture Preview? Eye-AF? Your call!

9. EXIF Data Transfer:

   • It's not just about optics; this adapter also transfers EXIF data to your camera.
   • Weather-resistant rubber mount gasket ensures a snug fit.

10. Cinema EOS Lens Support:

    • If you're into filmmaking, this adapter plays nice with Cinema EOS lenses (CN-E). Power zoom, autofocus, and auto iris—all supported.

11. Detachable Tripod Foot:

    • Compatible with Arca Swiss, Markins, and Photo Clam ball heads.
    • Because stability matters.

In summary, the Metabones Speed Booster ULTRA II 0.71x bridges the gap between Canon and Sony, making your lens collection even more versatile. Whether you're capturing stills or shooting video, this little adapter packs a big punch!