hasFocalRatio
P50520
predicate
Indicates a relationship where an optical system is associated with a specific focal ratio (f-number) that characterizes its light-gathering speed and image brightness.
All labels observed (3)
| Label | Occurrences |
|---|---|
| focalRatio | 6 |
| hasFocalRatio canonical | 6 |
| typicalFocalRatio | 2 |
Sample triples (14)
| Subject | Object |
|---|---|
| NTT 3.58 m Telescope | approximately f/11 at Cassegrain focus ⓘ |
| Schmidt–Cassegrain telescope design | around f/10 via predicate surface "typicalFocalRatio" ⓘ |
| Maksutov–Cassegrain telescope design | f/10 to f/15 via predicate surface "typicalFocalRatio" ⓘ |
| VISTA | f/3.25 via predicate surface "focalRatio" ⓘ |
| Simonyi Survey Telescope | f/1.234 via predicate surface "focalRatio" ⓘ |
| Curtis Schmidt Telescope | f/3.5 via predicate surface "focalRatio" ⓘ |
| NTT | approximately f/11 at Nasmyth focus ⓘ |
| UK Schmidt Telescope | f/2.48 via predicate surface "focalRatio" ⓘ |
| BTA-6 telescope | f/4 (primary focus) ⓘ |
| BTA-6 telescope | f/48 (Cassegrain focus) ⓘ |
| Pan-STARRS 1 telescope | f/4.4 via predicate surface "focalRatio" ⓘ |
| Nordic Optical Telescope | f/11 ⓘ |
|
SST
surface form:
Simonyi Survey Telescope
|
f/1.234 via predicate surface "focalRatio" ⓘ |
| Hubble Space Telescope Optical Telescope Assembly | f/24 ⓘ |