roby17269
R5, X2D II 100c, DJI Mavic 4 Pro & Mini 5 Pro
Sigma have been selling lenses for multiple mounts for most if not all of their existence. I assume they are efficient at doing that by now and I would not believe that that'd be the reason preventing them to sell RF AF FF lensesThose are not all additional costs: production and testing of the RF mount lenses must be arranged, packaging, marketing, add SKU to ordering and shipping systems, distribution, service/ repair organization etc. etc.
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