The Bresser 0.5x reduction lens is used to change the image field of a microscope camera. Itallows to zoom in or out. The brightness becomes more intensive, to reduce the exposure time.
For trinocular microscopes the adapter allows to adjust the focus to get the same focus for every eyepiece. It is compatible with 23.2mm eyepiece holders.
This adapter is designed for cameras with sensor sizes from 1/2 ” or 1/3”. The connection is made via 1 ” C-mount thread.