Erfle eyepiece (catalogue no. E59) focal length 15.5mm

Erfle eyepiece (catalogue no. E59) focal length 15

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Erfle eyepiece (catalogue no. E59) focal length 15
Science Museum Group
© The Board of Trustees of the Science Museum

Erfle eyepiece (catalogue no. E59) focal length 15.5mm, field of view 68 degrees, weight 1oz, bloomed

Details

Category:
Optics
Object Number:
1980-537
type:
eyepiece
credit:
English, H.W.