Culture flasks were so big, that microscope objective lenses couldn't come reasonably close to the subject. Hayflick told his Leitz sales representative about the problem, and the sales rep returned ...

Arthur Seibert ( 1906- 1980) was a lens designer for Ernst Leitz from ... Highly corrected EMO Wetzlar 5x Macromax loupe 2. Emoskop : this marvel is a telescope, a microscope and three magnifier ...