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    可调焦目镜
    EFL Focusing Instrument Eyepiece
    商品货号:ECS001963
    商品品牌:Edmund
    详细介绍

    Kellner-type design with fully coated optical elements in a twist focus barrel mount. With diopter scale (+2 to -2) and retractable eyeguard.

    Crossline Eyepiece Reticle

    #37-918 comes with the same specifications as #41-394, but with 1 1/4" OD adapter base to fit American Standard telescopes and optical instruments. A 17mm glass crossline reticle is mounted in the eyepiece

    EFL (mm) OD (mm) Length (mm) Stock No.
    27.5 39.0 45-53 #54-333
    21.5 39.0 39-46 #41-394
    17.5 39.0 39-46 #54-332
    21.5 38.5 34-47 #37-918
     
     

     

    商品名称
    27.5mm EFL Focusing Instrument Eyepiece 
    Effective Focal Length EFL (mm) 27.5
    Apparent Field (°) 50
    Eye Relief (mm) 17
    Field Stop Diameter (mm) 23.0
    Outer Diameter (mm) 39.0
    Length (mm) 45 - 53
    Mount 29.5 x 0.75
    RoHS Compliant 
     
    21.5mm EFL Focusing Instrument Eyepiece 
    Effective Focal Length EFL (mm) 21.5
    Apparent Field (°) 40
    Eye Relief (mm) 15
    Field Stop Diameter (mm) 17.0
    Outer Diameter (mm) 39.0
    Length (mm) 39 - 46
    Mount 24.0 x 1.0
    RoHS Compliant 
     
    17.5mm EFL Focusing Instrument Eyepiece 
    Effective Focal Length EFL (mm) 17.5
    Apparent Field (°) 50
    Eye Relief (mm) 12
    Field Stop Diameter (mm) 17.0
    Outer Diameter (mm) 39.0
    Length (mm) 39 - 46
    Mount 24.0 x 1.0
    RoHS Compliant 
     
    21.5mm EFL Focusing Instrument Eyepiece w/ Crossline Reticle 
    Effective Focal Length EFL (mm) 21.5
    Apparent Field (°) 40
    Eye Relief (mm) 15
    Field Stop Diameter (mm) 15.5
    Outer Diameter (mm) 38.5
    Length (mm) 34 - 47
    Mount 24.0 x 1.0
    RoHS Compliant 

    商品标记

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