Sigma macro 105mm lens

Started 3 months ago | Discussions thread
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maggymay
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Sigma macro 105mm lens
3 months ago

I recently bought a secondhand Sigma 105mm macro  EX lense with Canon mount for my Canon D450. Unfortunately I only tried it on f2.8 then when I got home found that it completely locked the camera with any of the other appertures.  I wonder if this could have been an old lens for a film camera?  Is it a complete throw away or can it be re-chipped

Nikon D4
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