The high performance GL Series stereo microscopes utilize a Greenough design and feature a 1:7 zoom ratio with a 103mm working distance and a large visual field. Their parfocality allows an erect image of the observed specimens to stay in focus through repeated changes in the magnification. They feature a guidepost structure, making them lightweight, and a pair of horizontal magnification changing knobs to maximize comfort. Adding to the ergonomics is a choice of observation angle, either 45 or 60 degrees. In addition to performance and comfort, a highlight of the GL is their durability. Promoting one of the finest ball bearing guideways in the world, the focusing mechanism is extremely robust
Standard configurations
| Zoom ratio | 1:7 | 
| Objective zoom range | 0.65X-4.5X | 
| Eyepice | SWF10X/22mm | 
| Working distance | 103mm | 
| Interpupillary distance adjustment | 55mm-75mm | 
| Binocular head | inclination of 45。or 60。 | 
| Diopter adjustment | ±5 diopter | 
| Optical Body Rotation | 360。 | 
Technical data
| 
             Project 
             | 
            
             Auxiliary Objective 
             | 
            
             Eyepiece 
             | 
            
             Working distance(mm) 
             | 
        |||||||
| 
             SWF10X 
             | 
            
             WFl5X 
             | 
            
             WF20X 
             | 
            
             WF25X 
             | 
        |||||||
| 
             Magnifi-cation 
             | 
            
             Visual field 
             | 
            
             Magnifi-cation 
             | 
            
             Visual field 
             | 
            
             Magnifi-cation 
             | 
            
             Visual field 
             | 
            
             Magnifi-cationn 
             | 
            
             Visual field 
             | 
        |||
| 
             Data 
             | 
            
             0.5X 
             | 
            
             3.3X-22.5X 
             | 
            
             67.7-9.8 
             | 
            
             4.9X-33.8X 
             | 
            
             49.2-7 
             | 
            
             6.5X-45X 
             | 
            
             40-5.8 
             | 
            
             8.1X-56.3X 
             | 
            
             37-5.2 
             | 
            
             163 
             | 
        
| 
             0.75X 
             | 
            
             4.9X-33.8X 
             | 
            
             45.1-6.5 
             | 
            
             7.3X-50.6X 
             | 
            
             32.8-4.7 
             | 
            
             9.75X-67.5 
             | 
            
             26.6-3.8 
             | 
            
             12.2X-84.4X 
             | 
            
             24.6-3.5 
             | 
            
             117 
             | 
        |
| 
             1X 
             | 
            
             6.5X-45X 
             | 
            
             33.8-4.9 
             | 
            
             9.8X-67.5X 
             | 
            
             24.6-3.5 
             | 
            
             13X-90X 
             | 
            
             20-2.9 
             | 
            
             16.3X-112.5X 
             | 
            
             18.5-2.6 
             | 
            
             103 
             | 
        |
| 
             1.5X 
             | 
            
             9.8X-67.5X 
             | 
            
             22.5-3.3 
             | 
            
             14.6X-101.3 
             | 
            
             16.4-2.3 
             | 
            
             19.5X-135X 
             | 
            
             13.3-1.9 
             | 
            
             24.4X-168.8X 
             | 
            
             12.3-1.7 
             | 
            
             45 
             | 
        |
| 
             2X 
             | 
            
             13X-99X 
             | 
            
             16.9-2.5 
             | 
            
             19.5X-135X 
             | 
            
             12.3-1.8 
             | 
            
             266X-180X 
             | 
            
             10-1.4 
             | 
            
             32.5X-225X 
             | 
            
             9.2-1.3 
             | 
            
             40 
             | 
        |