Classic 50mm lens by Meyer-Optik Görlitz, known for its distinctive bubble bokeh and warm image character.
Technical Details
The optical formula comprises three single lenses with a focal length of 50mm and a maximum aperture of f/2.8. The minimum focusing distance extends to 45cm, the filter diameter is 46mm, and the lens weighs 280 grams. The modern re-issue from 2017 features 15 aperture blades for uniform bokeh circles and multi-coating. Historical variants exist in M42, Exakta, and Pentacon Six mounts; current versions are available in Canon EF, Nikon F, Sony E, and Fuji X mounts.
History & Development
Hugo Meyer developed the original Trioplan in 1916 as a cost-effective alternative to more complex Tessar lenses. The 50mm version emerged in 1930 and was produced in various iterations until 1960. After reunification, OmegOn acquired the naming rights and introduced an optically identical re-issue in 2017. The bubble bokeh characteristic, initially considered an optical flaw, evolved into a sought-after stylistic element for portrait and art photography.
Practical Use in Film
Cinematographer Christopher Doyle used vintage Trioplan lenses for parts of Wong Kar-wai's "In the Mood for Love" (2000) to create dreamlike lighting moods. The distinctive bokeh rendering is suitable for flashback sequences, memory scenes, or surreal moments. In night shots, streetlights and neon signs create characteristic light circles that enhance emotionally charged atmospheres. The focus fall-off between f/2.8 and f/5.6 allows for subtle gradations between normal and bubble bokeh.
Comparison & Alternatives
While modern lenses correct for spherical aberrations, the Trioplan intentionally cultivates them. Petzval lenses produce similar, but less pronounced, circular out-of-focus highlights. The Soviet Helios 44-2 exhibits related bokeh characteristics with different optical properties. Digital post-production can simulate bubble bokeh but does not achieve the optical authenticity of the Trioplan. For standard cinematographic applications without stylistic effects, modern 50mm lenses offer higher sharpness and fewer aberrations.