Rochon micrometrical telescope by Lenoir, early 19th century. A refracting telescope fitted with a sliding rock crystal (calcite) calibrated for angular measurements 0-36 arcminutes.
Details
- Category:
- Astronomy
- Object Number:
- 1992-1015
- Measurements:
-
tube: 505 x 47 mm
case: 525 x 65 mm
- type:
- micrometer telescope
- credit:
- Tesseract
