Voigtlander Nokton 28mm F1.5 Aspherical

Early reviews describe a lens tuned for rendering rather than test-chart perfection. It is sharp at distance, softer at close and portrait ranges when wide open, and the frame edges improve noticeably by f/4 to f/5.6. Colour and contrast are good, and background blur is soft with well-formed bokeh balls.

Vignetting and chromatic aberration are clearly visible wide open, while distortion is very low and flare resistance is good. Because the lens is new, there is less lab data on it than on Cosina's older E-mount lenses.

Owners like the size, finish and focus feel, and use it as a small low-light street and travel lens on A7C and A7 bodies. Many describe the f/1.5 rendering as pleasantly classic without being soft.

Some owners report weak edges when stopped down a little, and others say their copies perform well at all apertures, which points to sample variation or field curvature. Vignetting wide open and the manual-focus-only design are the other common caveats.