Tuesday 22 May 2012

The proper way of using a magnifier

Since at least 1897 the Bausch & Lomb 20x Hastings Aplanatic Triplet has been the best hand held high power lens that is generally available for field use. 

Here is a handbook written by  Edward Bausch from 1901 that describes the lens and its correct use. From the days when a field scientist was expected to wear a suit, hat and moutsache.