Gregorian telescope c. 1745. This telescope is believed to be made by William Robertson. It comprises a primary concave mirror with a central hole and a smaller secondary concave mirror which share a common focus. The image is viewed through the hole in the primary mirror using an eyepiece lens. This telescope may be associated with Dr. Stephen Demainbray (1710-1782), a lecturer on experimental philosophy.
Details
- Category:
- King George III
- Object Number:
- 1927-1415
- Measurements:
-
length 245 mm
diameter 40 mm
height 135 mm
box: length 117 mm
width 90 mm
box: height 65 mm
- type:
- telescope - gregorian and telescope - reflecting
- rights:
- Unlinked Name
- credit:
- King’s College London
