02-26-2017, 10:35 AM
Quote:Some change the direction of focus and zoom rings to match the original manufacturer, some don't. IIRC, Zeiss does it but Sigma keeps it as is. So some of them at least have some of the internals changed from mount to mount. Not the optics though.
Most of them add the aperture ring on Nikon versions. Again, Zeiss does it but Sigma doesn't.
"Most of them" adding aperture rings made me wonder. Am I always buying the "wrong glass"? Can you give a current example - let's say, the lens is on market for no longer than 3 years - of an AF lens from third-party manufacturer with an aperture ring on Nikon verison? These rings are on their way to extinction, I only see them on manual focus lenses or older models.
As someone who uses MF only occasionally, I don't care that Tamron and Sigma usually go the Canon way of focussing direction, for me it's more like try and error, than a "learnt by long hours of doing" process.