Standard Guide for
Calibrating Reticles and Light Microscope Magnifications1
This standard is issued under the fixed designation E 1951; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
Click below to download stm E 1951 – 02 Pdf free
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Click here to Astm E 1950 – 98 (Reapproved 2003) Pdf free download