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| 
						 plan achromatic 195magnification  | 
					
						 4x  | 
					
						 10x  | 
					
						 20x  | 
					
						 40x  | 
					
						 60x  | 
					
						 100x  | 
				
| 
						 Number aperture  | 
					
						 0.10  | 
					
						 0.25  | 
					
						 0.40  | 
					
						 0.65  | 
					
						 0.85  | 
					
						 1.25  | 
				
| 
						 Optical Working distance  | 
					
						 29.04  | 
					
						 5.84  | 
					
						 1.16  | 
					
						 0.633  | 
					
						 0.49  | 
					
						 0.234  |