
The high performance GL99 Series stereo microscopes utilize a Greenough design and feature a 1:7 zoom ratio with a103mmworking 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  | 
		
| 
				 Eyepiece  | 
			
				 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。  | 
		
| 
				 Voltage input  | 
			
				 110V/60HZ or 220V/50HZ  | 
		
| 
				 Top halogen lamp  | 
			
				 6V15W adjustable brightness  | 
		
| 
				 Bottom fluorescent lamp  | 
			
				 5W  | 
		
Technical data: M means magnification, V means visual field, W means Working distance(mm)
A means Auxiliary Objective
| 
				 A  | 
			
				 Eyepiece  | 
			
				 W  | 
		|||||||
| 
				 SWF10X  | 
			
				 WFl5X  | 
			
				 WF20X  | 
			
				 WF25X  | 
		||||||
| 
				 M  | 
			
				 V  | 
			
				 M  | 
			
				 V  | 
			
				 M  | 
			
				 V  | 
			
				 M  | 
			
				 V  | 
		||
| 
				 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  | 
		
	 
