Tamron is working on some unique zoom lenses for full-frame sensors. While optical designs don’t generally mention lens mounts, we cannot comment on any of these being future RF mount lenses. One of the more interesting optical design choices is the internal zoom of a 100-400mm f/5.6-7.1. The physical lens is about195mm/7.6″, in comparison the [...] The post Tamron Working on an Internal Zoom 100-400mm f/5.6-7.1 appeared first on Canon Rumors....
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