Difference between revisions of "Focusing Device"
Jump to navigation
Jump to search
| (One intermediate revision by one other user not shown) | |||
| Line 15: | Line 15: | ||
[[Category:Alphabetical Index]] | [[Category:Alphabetical Index]] | ||
[[Category:IALA Dictionary 1970-89 Edition]] | [[Category:IALA Dictionary 1970-89 Edition]] | ||
[[Category:IALA Dictionary 2023 Revision]] | |||
Latest revision as of 03:59, 3 February 2024
2-4-050
Alternative term: Focuser (G.B.)
An optical device used for focusing (2-2-155), for example, a short telescope with cross-wire, fixed to the frame of the optic.
Note: In France and Germany, the type of focusing device mainly used projects, by means of lenses and prisms, an image of the luminous element of the light source on a screen fitted with a cross-wire and usually also with concentric rings.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
