Did anyone try the Tamron 85mm f/1.8 SP on the RP?

Started Apr 8, 2019 | Discussions thread
Tannin Senior Member • Posts: 1,367
Re: Did anyone try the Tamron 85mm f/1.8 SP on the RP?

Sittatunga wrote:

It's not Canon's anti-vignette function bug, it's Sigma's and Tamron's. Canon's anti-vignette function is tailored to the information it gets from the lens. It can't work properly if that information's spoofed.

Nonsense. All Canon needs to do is have the firmware test to see if the attached lens is one of the ones on its list of known lenses (it does this anyway, so as not to apply the vignette correction for a Canon 85/1.8 to a Canon 85/1.2L), and if the lens is not on its list, do nothing.

It's a trivially simple fix, but Canon chooses not to do it for marketing reasons. (They don't like the third-party makers and try to stuff them up where they can - so long as it's not too obvious, of course.)

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