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Specifications:Product name80X80 HD BinocularsMagnification10XEyepiece caliber18mmObjective diameter35mmMain materialMetal+RubberField of view5.8°Exit pupil diameter3.75mmDistance of exit pupil13mmNear focal distance4mPupillary distance56-72mmPrismBAK4 prismCoating of lensesFMC Multilayer coatingWa..

Specification:Product name F50070MType RefractometerObjective lens diameter70mm (2.75 inches)Focal length500mm (f/6.25)EyepieceK10mm.K25mmExtender3×Barlow lensFinder5×24Prism 45 degree correction like prism diagonalTripodAdjustable aluminum tripodWeight2.5KGFeatures:1. 70mm large diameter and 500mm ..