Optical tube trinocular
Eyepiece(wide field) 10X (view field .91″ DIA)
Objective 0.6X~5X (zoom)
Zoom ratio 1:8.3
Pupil distance 2.17~2.95″
Diopter adjustment +/-5 diopter(two eyepieces)
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Insize 6140, DEPTH BASE ATTACHMENT, suitable for calipers with beam width (w) .630", 6928640303579 