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Eyepiece micrometer
This is a parallel wire distance eyepiece micrometer which is a type of filar micrometer. The eyepiece micrometer has a focal length of 19.05mm. It has a large thread and is made up of a large wooden mount with large brass silvered circle. The wire is missing.
It would probably have been used to measure the distance between stars or between nebulae, star clusters and stars by the maker's older brother, William Herschel.
It would probably have been used to measure the distance between stars or between nebulae, star clusters and stars by the maker's older brother, William Herschel.
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Object Details
| ID: | AST0858 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Eyepiece micrometer |
| Display location: | Not on display |
| Creator: | Johann Alexander Herschel |
| Date made: | circa 1800 |
| People: | Herschel, William |
| Credit: | National Maritime Museum, Greenwich, London, Herschel Collection |