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              [html]<thead><tr><td>_</td><td>System</td><td>Plaqifillation</td><td>Aperture</td><td>Distance</td></tr></thead><tbody><tr><tdrowspan="3">Achromatic Objective</td><td>Dry</td><td>4x Adjustable Focus</td><td>0.1</td><td>37.42mm</td></tr><tr><td>Dry</td><td>10 ×</td><td>0.25</td><td>7.14mm</td></tr><tr><td>Dry</td><td>40x Spring Adjustable Focus</td><td>0.65</td><td>0.57mm</td></tr></tbody>
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  **OPERATION**
  
  **Model AY11240**
  
  1. Remove components from package. 
   identify all parts before assembling. 
  2. Attach 4x, 10x and 40x objectives 
   to revolving turret. 
  3. Place the specimen on the stage and 
   secure with spring clips. NOTE: The 
   cover glass must face upward (the 
   thinner glass is the cover glass), 
   otherwise when the 40x objective is 
   used the specimen cannot be 
   observed. Observation is best when 
   the thickness of the cover glass is 
   0.1-1.1mm and the cover glass is 
   0.17mm. 
  4. Adjust the stand to an angle that 
   provides comfortable observation. 
  5. Rotate and adjust concave mirror to 
   light the field of view.**NOTE: Do not**
  **reflect the Sun with the mirror.**
  **This can cause serious eye injury**
  **or permanent eye damage.**
  6. Observe the specimen using the 
   lowest magnification objective first. 
   The 4x objective provides a larger 
   field of view to search specimen. 