Avenon's compact reportage wide — the 28mm f/3.5 in Leica Thread Mount.
The Avenon 28mm f/3.5 in Leica Thread Mount is a compact Japanese wide-angle from around 1990, made by Kobayashi Seiki and sold under the Avenon name (the same maker's lenses were also branded Kobalux). It is a modern screw-mount wide from the early 1990s for L39 and adapted rangefinder bodies.
It is a manual-focus rangefinder-coupled lens with a 28mm focal length and a maximum aperture of f/3.5. The barrel is very compact, and the lens couples to the rangefinder for focus, with a 28mm external finder or in-body frame lines used for composition.
At 28mm the lens covers the classic reportage and street angle of view, and the small size keeps it discreet and easy to carry. It renders evenly with good contrast, and stopping down gives broad depth of field and clean corners for landscape and documentary use.
Being a relatively modern lens, used examples are usually mechanically sound; check for clear glass, smooth focus and a crisp aperture, plus any haze or cleaning marks. It adapts to Leica M with an LTM-to-M ring and to mirrorless cameras via a simple adapter, with a matching finder or the screen used for framing.