
Smythian telescope, refractor of 3 3/4 inch aperture, 50 inch focal length
Smythian telescope, c. 1825, refractor of 3 3/4 inch aperture and 50 inch focal length by Thomas Robinson, Portland Place, London with optics by Charles Tulley the elder. Fitted with adjustabe diaphragn and lens for illuminating cross-wires on micrometers and eyepieces. Equatorial mount and stand missing but hook arms and stabilising bar present along with later tube clamps.
- Materials:
- brass , steel and incomplete
- Object Number:
- 1988-197 Pt1
- type:
- instrument component , refracting telescope and filar micrometer
- Image ©
- The Board of Trustees of the Science Museum