Optional equipment for Bresser microscopes: Erudit 40-1000x NV, Researcher Bino (NV and earlier versions) and Researcher Trino (NV and earlier versions), Analyth Bino and Science TRM-301. The condenser is mounted in place of the Abbe condenser.
The use of a dark field condenser in a microscope allows the contrast of the preparation image to be increased without the need to stain it. In contrast to the bright field method, where rays pass through the optical system, not covered by the preparation, in the dark field of the eyepiece pass only the rays refracted by the observed preparation, resulting in a bright image on a dark background (see photo below). This technique is used in the study of live preparations enabling non-invasive tests ensuring the possibility of observation in real time and under high magnification. The oil condenser of the dark field is used to test preparations using oil lenses (the optics are immersed in a drop of immersion oil). As a result, the condenser usually works with 100x lenses, which are usually oiled.  (Source: Wikipedia.org) 2 years Keywords for the product: dark field, dark field, dark field observation >> BLOOD IN THE DARK FIELD <<
     (blood pictures taken with Bresser Researcher Trino microscopes and the old Carl Zeiss Stand 'L' microscope model 1934, Bresser camera 3.0 microcam, 100x lenses with Bresser Researcher and TS 60x achromatic lens, pictures reduced for web needs, archive with photos in original spacing -  HERE (.RAR) )
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