The Meyer-Optik Görlitz Trioplan 100mm f/2.8 is a short telephoto lens built around the classic three-element Cooke triplet formula, supplied here in M42 screw mount for use on mid-century SLRs. Produced by the East German optical works at Görlitz, it was intended as a portrait and medium-tele lens and has become known today for the distinctive 'soap bubble' bokeh its simple optical design produces on specular highlights.

At recent UK auction, hammer prices for the M42 Trioplan 100mm f/2.8 have been modest, with a 2023 sale at £62 and a February 2026 result of £81, giving a two-sale median of around £71. With only a pair of saleroom records to reference, this is a thin dataset, and what a clean M42 Trioplan is worth in 2026 can swing with cosmetic condition and glass clarity; the reissued modern Trioplans and the earlier pre-war variants sit in very different markets and should not be conflated with these screw-mount results.