.... really, how many lenses does Sigma actually sell?
They sold me the 1.8/18-35mm ART, the 1.4/35mm ART, the 1.4/50mm ART,
the 1.8/135mm ART.
They couldn't sell me the 2.0/200mm ART yet, because it isn't available
in either EF or RF. Otherwise......
And I am still on the fence for a reasonably priced pre-owned 2.8/120-300mm SPORTS.
My main point is that few other lenses perform as free of CA wide open
as the Sigma ARTs do. And damn sharp they are as well wide open.
This is a point that many Canon lenses don't achieve, even *IF* Canon has
an equivalent focal length
All of them perform wonderful with the drop-in filter adapter, I use them
on 1D-X, 5D MkIV, RP, R5C, C70, BMPCC 6k PRO. Since video is by now
a significant part of my work, the V-ND drop-in filter is indispensable
for those cameras that don't have a built-in ND.