Sigma teleconverters and mount adapters I own a Sigma 60-600mm lens for Canon EF mount, which I convert to Sony E mount using Sigmas MC-11 adapter. I would like to add a 1.4* teleconverter, but Sigma says you can’t use a teleconverter with the MC-11. Is this true? I don’t see any reason that this should be the case. Has anyone tried to use a teleconverter with the MC-11 adapter? If it…

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Are there any lens adapters and/or smartphone-native lenses that are actually worth a damn? I see such a wild spread of anywhere from $20 little clip-ons to $500 rigs for your proper glass and I have to wonder if any of that matters when it’s being filtered through the little piece of protective plastic onto your microscopic sensor. Of course I instinctual shy away from the cheap stuff, but if I’m just trying to get something like a l…