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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 

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