Fixed Position and Fixed a Times Functions, with Simple Operation, excelent Optical Performance. Fixed position and fixed times function. With Simple Operation Excellent Optical Performance. Can add the middle light path between the viewing head and the zoom tube
a:4:{i:0;a:2:{s:4:"name";s:7:"Domain:";s:3:"val";s:10:"laboratory";}i:1;a:2:{s:4:"name";s:21:"Other characteristic:";s:3:"val";s:4:"zoom";}i:2;a:2:{s:4:"name";s:16:"Microscopy type:";s:3:"val";s:7:"optical";}i:3;a:2:{s:4:"name";s:16:"Microscope head:";s:3:"val";s:9:"binocular";}}