One of the most important features of the NGS-2020 series of microscopes is the additional magnification in the trinocular tube, which produces 40X higher magnification on the viewing screen than through the eye pieces. This additional on-screen magnification is ideal in a live blood analysis microscope as it allows the user to achieve a higher level of magnification on the screen with a normal dry 40X objective (1600X) than what is achieved with a 100X oil objective (1000X) in other standard systems. This also enables the user to achieve a total magnification of 4000X with the 100X oil objective, ideal for advanced darkfield analysis.
The main trade-off with this configuration is that the additional on-screen magnification produces too high a level of magnification for dry blood imaging. The user is not able to see the same large field of view on the screen as what can be seen through the eye pieces. This can now be overcome with the optical zoom lens and 2.5X objective.