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FusionOptics Optical Technology Visualizes even the Smallest Details

Stereo Microscope with a Difference Leica M205 C

Leica Microsystems overcomes the inherent limitations of traditional stereo microscopy with a revolutionary optical concept. By incorporating the FusionOptics optical concept, the Leica M205 C is the world’s first stereo microscope with 20.5:1 zoom to achieve an optical resolution of 0.952 µm.

But what does “FusionOptics optical technology” mean? The right channel delivers an image with the highest possible resolution; the left channel provides an image with maximum depth of field. The human brain does the rest: Drawing the best information from both images, it creates a three-dimensional image, now you can visualize even the finest details of your specimen.

The Leica M205 C is an encoded microscope, i.e., the magnification and the iris diaphragm position are transmitted to the software in real time. A scale bar can be displayed with the live image and updated when the magnification changes. When an image is stored, the parameters are saved with the image and can be recalled whenever needed.

Leica M205 C with Transmitted Light Base Leica TL5000 Ergo

Your Advantages

Optical Opposites Reconciled: FusionOptics Optical Technology Reproduction and Documentation with a single Keystroke

Optical Opposites Reconciled: FusionOptics Optical Technology

FusionOptics optical concept produces images that combine superlative resolution with maximum depth of field for perfect 3D visualization of images. See the Science Lab article, “Fusion Optics – Combines high resolution and depth of field for ideal 3D optical images” to find out exactly how this technology works.

Reproduction and Documentation with a single Keystroke

Leica Application Suite (LAS) software lightens your workload by showing both the magnification setting and the position of the iris diaphragm in real time and storing them with each image. What more efficient way to reproduce and document your results? 

Apochromatic 20.5:1 Zoom with Standard Magnification of 7.8x to 160x High-Performance Optics: Numerical Aperture of 0.35

Apochromatic 20.5:1 Zoom with Standard Magnification of 7.8x to 160x

Due to the high zoom and magnification range of the Leica M205 C, you can perform a wide variety of tasks without changing the objective or even switching to a different microscope. Our most popular objective, the 1.0x PlanApo, images an object field of max. 29.5 mm diameter at 7.8x magnification. At 160x magnification, details as small as 1.9 µm can be visualized.  

High-Performance Optics: Numerical Aperture of 0.35

The 2.0x PlanApo objective is an optical masterpiece. It has a maximum aperture of 0.35 – that’s the highest numerical aperture (NA) that has ever been achieved with a stereo microscope worldwide. Based on the optical laws of Ernst Abbe, the Leica M205 C can attain an optical resolution of 1050 LP/mm (line pairs per millimeter) or 0.952 µm. This resolution means you can see details that are smaller than a hundredth of the diameter of a human hair.  

Powerful Range of Illuminators Modularity

Powerful Range of Illuminators

From homogeneous illumination with a ring light to highly diffuse dome illumination for strongly reflective samples – with the Leica M205 C you always present your specimens in the best light. You can use all the incident light sources of the Leica LED5000 series and the transmitted light bases of the Leica TL3000-5000 series. Information on our unique range of illuminators.


Do you need a microscope that helps you to meet different requirements? No problem with the Leica M205 C. Choose from a wide range of accessories to customize the system to your specific needs. Leica Microsystems’ M series is designed to cater to your changing requirements, too.