マウントアダプターメーカーのMetaboneが、0.71倍という変換レンズを内蔵するマウントアダプター“Speed Bootster”を発売します。 Petersburg, VA, USA, January 14, 2013 – Metabones® and Caldwell Photographic jointly announce a revolutionary accessory called Speed Booster™, which mounts between a mirrorless camera and a SLR lens. It increases maximum aperture by 1 stop (hence its name), increases MTF and has a focal length multiplier of 0.71x. For examp
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