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Amazon.com : Fotodiox Lens Mount Adapter - T-Mount (T/T-2) Screw Mount SLR Lens to Pentax K (PK) Mount SLR Camera Body,T2-PK : Electronics
Ultra short 18 mm flange distance on FF has more vignetting.: Sony Alpha Full Frame E-mount Talk Forum: Digital Photography Review
Why are mirrorless cameras introducing new lens mounts? Why isn't it just about removing the mirror and keep the existing lens system? - Quora
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