information about Focal length field
Field Hierarchy
| Parent | |||
|---|---|---|---|
Biology 35.4M papers | Physics 32.1M papers | Engineering 24.4M papers | Geology 9.3M papers |
Optics 8M papers | Paleontology 5.4M papers | Petroleum engineering 477k papers | Lens (geology) 163k papers |
| Current | |||
Focal length 13.3k papers | |||
| Child | |||
Zoom lens 1,576 papers | Angular aperture 1,022 papers | Simple lens 897 papers | |
Trends
Field Trends