This video of the Sigma lens manufacturing process is just that. Coming from the YouTube channel ProcessX, the video shows the Sigma 70-200mm ... together a lens. Zoom lenses offer their own ...

This lens is one of two virtually identical offerings from Sigma in the extremely ... the next third is occupied by the zoom ring which is marked at 70, 100, 135, 200 and 300mm.

Sigma rumored to be working on a 200mm f/1. ... Prime optics famously offer faster maximum apertures than zoom lenses. This allows photographers to shoot at faster shutter speeds in low-light ...