Kowa Lens Microscope Objective Lens LM50-IR

Kowa Lens Microscope Objective Lens LM50-IR

Kowa's LM50-IR is a manual fixed focal length lens with IR correction to ensure a smooth transition from day to night lighting conditions without manual adjustments. This large format lens produces low distortion images thus creating the clearest picture possible.
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History of optics and Camera lens

Ptolemy (2nd century) wrote a book on Optics, which however survives only in the Latin translation of an incomplete and very poor Arabic translation. The book was, however, received, by medieval scholars in the Islamic world, and commented upon by Ibn Sahl (10th century), who was in turn improved upon by Alhazen (Book of Optics, 11th century). 

 Spectacles were invented as an improvement of the "reading stones" of the high medieval period in Northern Italy in the second half of the 13th century.This was the start of the optical industry of grinding and polishing lenses for spectacles, first in Venice and Florence in the late 13th century century,and later in the spectacle-making centres in both the Netherlands and Germany.Spectacle makers created improved types of lenses for the correction of vision based more on empirical knowledge gained from observing the effects of the lenses (probably without the knowledge of the rudimentary optical theory of the day).The practical development and experimentation with lenses led to the invention of the compound optical microscope around 1595, and the refracting telescope in 1608, both of which appeared in the spectacle-making centres in the Netherlands.