Statements (20)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
astronomer
|
| gptkbp:advantage |
low maintenance
high contrast images chromatic aberration (in achromats) expensive (for apochromats) heavy and long tube |
| gptkbp:aperture |
6 inches
|
| gptkbp:hasFocalLength |
varies
|
| gptkbp:hasType |
gptkb:alt-azimuth_mount
equatorial mount |
| https://www.w3.org/2000/01/rdf-schema#label |
6-inch Refractor
|
| gptkbp:notableExample |
Alvan Clark 6-inch refractor
|
| gptkbp:popularFor |
amateur astronomy
|
| gptkbp:telescopeType |
refractor
|
| gptkbp:usedFor |
astronomer
planetary observation double star observation |
| gptkbp:usesLens |
objective lens
|
| gptkbp:bfsParent |
gptkb:Royal_Observatory,_Cape_of_Good_Hope
|
| gptkbp:bfsLayer |
7
|