Metabones Speed Booster first impressions at DPReview: "Image quality is very impressive, with results that compare exceptionally well against a full frame sensor. You do pay a small price in terms of corner softness and CA."

Metabones Speed Booster first impressions at DPReview: "Image quality is very impressive, with results that compare exceptionally well against a full frame sensor. You do pay a small price in terms of corner softness and CA."

This evaluation by the Diallo & Butler duo focuses more on stills photography rather than video, and this is why we like it. Nice explanation of the focal reducer technology, and with/without the SpeedBooster adapter side-by-side pics. At the DPreview bench was the only auto-focusing version of the adapter, the NEX to EF lens version, but as the reviewers found out, the AF performance is not to be taken too seriously:

"There's a lot to be excited about with a product that so transforms lens behavior and addresses such a long-standing issue for photographers who long for the wide-angle and light-gathering performance of their older full frame lenses on their newer APS-C body. Image quality is very impressive, with results that compare exceptionally well against a full frame sensor. You do pay a small price in terms of corner softness and CA.

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