It looks like Tamron is going to be announcing a 17-50mm f/4 lens some time this year going by the latest optical formula patent to appear. This patent looks pretty in-depth and that's usually a sign of things to come. This optical formula is for full-frame sensors and the lens also has an internal zoom [...] The post Tamron 17-50mm f/4 optical formula appears in latest patent appeared first on Canon Rumors - Your best source for Canon rumors, leaks and gossip....
Published By: Canonrumors - Tuesday, 4 July, 2023