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      LOCATION： HomeProduct CenterOptical instrumentationField Checker with bubble BJ-018
Name：Field Checker with bubble BJ-018
Technical parameters：
The checker is used to check the field of view and 
center deviation of field in the binoculars.
Details：
 

Focal length of objective lens:  195.75mm

Field of view:   30°

Useful aperture of objective lens: Ø 52mm

Graduation value range in horizontal direction: ±12°30′

Minimum value in horizontal direction: 6′

Minimum division value in vertical direction: 0 – 1 (mil)

Graduation value range in vertical direction: ±0 – 200 (mil)

Division value of horizontal and vertical bubbles: 30″

 
 
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