Misbehaving Sigma Art 20mm F1.4

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G Dickson Regular Member • Posts: 158
Misbehaving Sigma Art 20mm F1.4

Hoping for some help from the hive mind.  A very kind person just gave me a 20mm Sigma F1.4 art lens on a six month loan.  On my 1DMKIV on live view when I punch in to check focus it will not magnify.  I just get a message saying "the image cannot be magnified in live view".   I have not experienced this with my Sigma 120-300 or the 8-16...    If anyone knows of a fix or not I would be very grateful.

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