Product: GL Optics
Does the Sigma 18-35mm f1.8 hold focus when zoomed? And could your lens adapter be part of the problem or solution?
G.L. Optics show how they set up their cine rehoused Sigma zooms
G.L. Optics announce new range of medium format PL cine lens conversions
IBC 2016: GL Optics offers PL conversion of the best stills lenses in the world, the Zeiss Otus
BIRTV 2013: G.L.Optics show off Cinema converted Sigma 18-35mm f1.8 and Leica R primes
Video review: G.L. Cinemod Optical Services 11-16mm f2.8 PL lens conversion