Leica S Series User Manual by Leica Microsystems (source code)

= Leica S Series User Manual by Leica Microsystems
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https://downloads.leica-microsystems.com/S9%20E/User%20Manual/Leica_S-Serie_UserManual_EN.pdf

Primary manufacturer manual. Printed p. 13, “What Your Stereo Microscope has to Offer you”: two converging optical paths, convergence angle and physical access to the specimen.