Joel Posted May 13, 2014 Share Posted May 13, 2014 The Lens Turbo (.72x Speedbooster clone (.71x)) works with vignetting: I spoke with the guys at Metabones last year and they assured me that a speed booster with MF lenses is possible and they are looking into it. You got vignetting because of the adapter. Quote Link to comment Share on other sites More sharing options...
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