| 
 Type  
 | 
  Semi Plan Strain Free (Polarizing) 
 | 
| 
 Optical  
 | 
  Finite (Non-Infinity) Tube Lens  
 | 
| 
 Tube Length  
 | 
  F=160mm 
 | 
| 
 Magnification  
 | 
  20X 
 | 
| 
 Numerical Aperture (N.A.)  
 | 
  0.40 
 | 
| 
 Focal Length (F.L.)  
 | 
  8.6mm 
 | 
| 
 Working Distance (W.D.)  
 | 
  1.8mm 
 | 
| 
 Parfocal Distance  
 | 
  45mm 
 | 
| 
 Cover Slip Correction 
 | 
  -mm 
 | 
| 
 Diameter Threads 
 | 
  0.7965" (20.1mm) DIN Standard 
 | 
| 
 TPI  
 | 
  36 
 | 
| 
 Whitworth 
 | 
  55° 
 | 
| 
 Diameter (mm)  
 | 
  -mm 
 | 
| 
 Length (mm)  
 | 
  -mm 
 | 
| 
 Weight (g)  
 | 
  70g 
 | 
| 
 Oil  
 | 
  ? 
 | 
| 
 IS9001  
 | 
  ? 
 |