Statements (17)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
eye
|
| gptkbp:advantage |
low cost
good image quality narrower field than modern designs prone to ghosting |
| gptkbp:fieldOfView |
40-50 degrees
|
| gptkbp:hasLensElements |
3
|
| https://www.w3.org/2000/01/rdf-schema#label |
Kellner eyepiece
|
| gptkbp:introducedIn |
1849
|
| gptkbp:inventedBy |
gptkb:Carl_Kellner
|
| gptkbp:lensConfiguration |
achromatic doublet and singlet
|
| gptkbp:suitableFor |
low to medium magnification
|
| gptkbp:type |
achromatic eyepiece
|
| gptkbp:usedIn |
gptkb:electron_microscope
astronomer |
| gptkbp:bfsParent |
gptkb:Refracting_telescope
|
| gptkbp:bfsLayer |
7
|