Overview

The Isco-Gottingen Regula-Westron 35mm f/3.5 is a manual focus M42 lens. Users report that it offers excellent 3D-like rendering and pleasing bokeh for a 35mm lens. However, some note that Isco glass generally receives mixed opinions, though individual copies can be very good (RioRico). Build quality is solid with a metal barrel and smooth focus. It suits photographers seeking a compact, characterful wide-angle with a vintage look, especially for rendering and bokeh, but may not satisfy those wanting clinical sharpness.