Standard Microscope Eyepiece Pickup Points

The eyepiece pickup point is on the intermediate image focal plane for a compound microscope, as shown in the diagram below. For a tube length 'TL', we can define this point's location by distances within the microscope body tube: 'D1' down from from the top of the tube or 'D2' up from the objective shoulder. Note: - TL = D1 + D2 - All dimensions are given in (mm)

Manufacturer ------------- A.O.Spencer Bausch & Lomb Bausch & Lomb (Met) Beck Beck (Met) C.Baker Cooke, Troughton & Simms Leitz Leitz (Met) Leitz (Ultropak) Nikon Olympus Reichert Reichert (Met) Zeiss-Winkel Zeiss (old, pre 1948) Zeiss (Oberkochen) Zeiss (Oberkochen, old)

D1 -- 11.3 11 11 10 10 0 20 18 18 18 10 xx 13 13 5 15 10 13

D2 -- 148.7 149 204 150 190 160 140 152 197 167 150 xxx 147 177 155 145 150 147

TL -- 160 160 215 160 200 160 160 170 215 185 160 xxx 160 190 160 160 160 160

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  Ref. Nikon manual (1989)

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