|HSZ6-TBL stereo microscope is shown above.|
Every stereo microscope derives its total magnification from a combination of the eyepieces and the built-in objective lens.
- Eyepieces are typically 10x magnification, although they are occasionally 15x or 20x.
- The built-in objective lens can be single (1x for example), dual (2x and 4x for example), or zoom (1x-4x with every magnification in between).
There are a few other options for manipulating total magnification on a stereo microscope. An optional auxiliary lens can be screwed onto the bottom of the objective lens on most stereo zoom microscopes in order to increase or decrease total magnification and working distance. Typical auxiliary lens magnifications include 0.5x, 1.5x, or 2x. With the above mentioned microscope setup of 10x eyepieces and a 1x-4x built-in objective lens, if you added a 1.5x auxiliary lens the total magnification would become 15x-60x.
Finally, the c-mount adapter affects the magnification of the camera. Most of the time it is easier to use the microscope if the image seen through the eyepieces is the same magnification that the camera sees. This is accomplished by matching the microscope eyepiece magnification with the pairing of the magnification in the c-mount adapter with the chip size in the camera. There is a chart on this page that explains matching c-mount adapters with image sensors.