***** To join, leave or search the confocal microscopy listserv, go to: http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy Post images on http://www.imgur.com and include the link in your posting. ***** Hi Petro, that's is a TV/camera port, You need a C mount adapter like the ones reported at the link https://drive.google.com/open?id=1u42itZxmUSgWkuuWe8jJ_N5SanCLRZ0k The 1X should work in most of the cases and yet available (11541510) Regards Tommaso