![Ramsden's astronomical equatorial instrument, with 2-1/4 inch aperture and 18-inch focal length | Science Museum Group Collection Ramsden's astronomical equatorial instrument, with 2-1/4 inch aperture and 18-inch focal length | Science Museum Group Collection](https://coimages.sciencemuseumgroup.org.uk/images/323/291/medium_SMG00030501.jpg)
Ramsden's astronomical equatorial instrument, with 2-1/4 inch aperture and 18-inch focal length | Science Museum Group Collection
![iOptron CEM70 "center-balanced" go-to equatorial mount, iPolar finder, without tripod | Astronomics.com iOptron CEM70 "center-balanced" go-to equatorial mount, iPolar finder, without tripod | Astronomics.com](https://www.astronomics.com/media/catalog/product/cache/1/image/1800x/040ec09b1e35df139433887a97daa66f/c/e/cem70ag_side_1a.jpg)
iOptron CEM70 "center-balanced" go-to equatorial mount, iPolar finder, without tripod | Astronomics.com
![Sky-Watcher EQ3D Astronomical Telescope German Equatorial Mount With Instrument Aluminum Tripod Astrophotography | Lazada PH Sky-Watcher EQ3D Astronomical Telescope German Equatorial Mount With Instrument Aluminum Tripod Astrophotography | Lazada PH](https://my-live-01.slatic.net/p/20391fd186047a648e6e92daed601934.jpg)
Sky-Watcher EQ3D Astronomical Telescope German Equatorial Mount With Instrument Aluminum Tripod Astrophotography | Lazada PH
![Troughton equatorial. This telescope and mount was made by the British instrument maker Edward Troughton (1753-1835). This artwork is from "An Introduction to Practical Astronomy", published by William Pearson in several volumes Troughton equatorial. This telescope and mount was made by the British instrument maker Edward Troughton (1753-1835). This artwork is from "An Introduction to Practical Astronomy", published by William Pearson in several volumes](https://l450v.alamy.com/450v/2hjcm8y/troughton-equatorial-this-telescope-and-mount-was-made-by-the-british-instrument-maker-edward-troughton-1753-1835-this-artwork-is-from-an-introduction-to-practical-astronomy-published-by-william-pearson-in-several-volumes-between-1824-and-1829-2hjcm8y.jpg)
Troughton equatorial. This telescope and mount was made by the British instrument maker Edward Troughton (1753-1835). This artwork is from "An Introduction to Practical Astronomy", published by William Pearson in several volumes
![Universal equatorial instrument by Edward Troughton, English maker of astronomical instruments. Copperplate engraving by Wilson Lowry after a drawing by J. Farey Jr. from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Universal equatorial instrument by Edward Troughton, English maker of astronomical instruments. Copperplate engraving by Wilson Lowry after a drawing by J. Farey Jr. from Abraham Rees' Cyclopedia or Universal Dictionary of Arts,](https://c8.alamy.com/comp/2A7BRH5/universal-equatorial-instrument-by-edward-troughton-english-maker-of-astronomical-instruments-copperplate-engraving-by-wilson-lowry-after-a-drawing-by-j-farey-jr-from-abraham-rees-cyclopedia-or-universal-dictionary-of-arts-sciences-and-literature-longman-hurst-rees-orme-and-brown-london-1820-2A7BRH5.jpg)