I have finally decided to disperse my large collection ( 250+) of mostly prime focal-length M42 screw-thread lenses which I have enjoyed acquiring over many years. Most are either German or Russian manufacture, and all lenses to be listed are  useable, but it must be borne in mind that most of these optical instruments are between 20 and 60 years old, and will inevitably have some dust inside them ( they have all been used and not kept in a vacuum !), and probably some cleaning/coating marks. However , unless otherwise stated, they will be fungus- free, and mechanically sound. Cosmetically they will show signs of light to moderate use but not abuse. All can be used on the millions of M42 screw-fit Pentaxes, Chinons, Ricohs, Zeniths, Edixas etc., as well as almost all non-M42 film- based SLRS ever made ( with  appropriate adapter ), and of course newer Digital SLRS ( again with appropriate adapter . Effective focal length on DSLRS will be approximately 1.5x the marked focal length, and results on non-film cameras will vary- remember these lenses were manufactured for use on film-based cameras , often before computers were in regular use , and digital cameras had yet to be conceived).

GOOD QUALITY ALLOY FINISH MEYER-OPTIK GORLITZ TRIOPLAN 100MM F2.8 TELEPHOTO LENS WITH PRESET DIAPHRAGM IN PENTAX/PRAKTICA M42 SCREWFIT.
GLASS CONDITION-GENERALLY UNMARKED, SLIGHT INTERNAL DUST, NO FUNGUS.
MECHANICAL CONDITION - GOOD, WITH SIGNS OF NORMAL USE ONLY.

WEIGHT 275GMS
REF.551