Keuffel & Esser K&E Model 71-4210 Visual Autocollimator with Micrometer and

Retrofit 6W LED Light Source & Power Supply

Great Condition. 

There are some paint chippings on body, but optics is clean and perfect (see last photo for

a real image)

Includes:

• Mode 71-4210 autocollimator
• Illumination 6W LED light source & power supply (including LED bulb)
  
• Instruction Manual
  

Specs:

• Focal length:                                   900mm
• Clear aperture:                                50mm
• Telescope magnification:                53X
  
• Measurement range:                       +/- 5 arc min
  
• Accuracy:                                         0.2 arcsec (direct reading); 0.1 arcsec (estimated reading)
  
• Field of view:                                   22 arcmin
• Wording distance:                            0-50 feet with full micrometer; 50-100 feet with +/- 2 minute range