I do wonder about Digital Picture reviews when it comes to third party lenses, bcoz they somehow always seem to get bad copies of their first few third party lenses
That's the whole problem with the third party lenses with too many bad copies. Reportedly, the Sigma 35mm f/1.4 is the only exception.
To be frank the only reason I've not got the Sigma 35mm f/1.4 is that it is not yet available in a brick and mortar store where I live. I've had too many bad experiences with third party lenses and never buy them if they cannot be returned if I don't like them.
1DX, 5D3, 600D, RX100
16-35L, 24-70L II, 70-200L II, 100-400L II, 50L, 85L II, 135L, 17TSE, 24TSE, 40, 100 macro, 18-55 II, 55-250 II, 1.4x III, 2x III, 600RT x 4
When it comes to gear, it is better to vote with your wallet. Bitching on online forums like a lunatic doesn't get you anywhere!