Leitz Laborlux 12 Microscope with EPI Fluorescent & Hoffman Modulation

Description

Very nice Leitz Laborlux 12 with EPI Fluorescent and Hoffman Modulation Turret.
Objectives:
Olympus A 4 / 0.10
Leitz EF 10 /0.25 Hoffman Modulation
Leitz NPL Fluotar L 25 / 0.35 Hoffman Modulation
Leitz NPL Fluotar 40x / 0.70
Leitz 100 / 1.25 (oil)
Leitz I2 Excitation Filter Cube For Fluorescence Microscope 513604.
NOTE:  The mercury bulb is not included.  One of the stage's
vernier scales is missing (see first photo).  This microscope will likely be shipped in three well-packed cartons.
From Wikipedia:
Hoffman modulation contrast microscopy (HMC microscopy) is an optical microscopy technique for enhancing the contrast in unstained biological specimens. The technique was invented by Robert Hoffman in 1975.[2] Like differential interference contrast microscopy (DIC microscopy), contrast is increased by using components in the light path which convert phase gradients in the specimen into differences in light intensity that are rendered in an image that appears three-dimensional. The 3D appearance may be misleading, as a feature which appears to cast a shadow may not necessarily have a distinct physical geometry corresponding to the shadow. The technique is particularly suitable for optical sectioning at lower magnifications.[3][4]
An example of the use of HMC illumination is in in-vitro fertilisation, where under brightfield illumination the near-transparent oocyte is hard to see clearly.
HMC systems typically consist of a condenser with a slit aperture, an objective with a slit aperture, and a polariser which is fitted between the condenser and the illumination source and is used to control the degree of contrast. The principle of HMC is used by a number of microscope manufacturers who have introduced their own variants of the technique, for example, ZEISS improved Hoffman Modulation Contrast (iHMC), Nikon Advanced Modulation Contrast (NAMC), Olympus Relief Contrast (RC) and Leica's integrated Hoffman Modulation Contrast (iMC).