information about Focal length field
Field Hierarchy
Parent | |||
---|---|---|---|
Biology 35.7M papers | Physics 32.4M papers | Engineering 24.7M papers | Geology 9.4M papers |
Optics 8M papers | Paleontology 5.4M papers | Petroleum engineering 486k papers | Lens (geology) 164k papers |
Current | |||
Focal length 13.3k papers | |||
Child | |||
Zoom lens 1,581 papers | Angular aperture 1,023 papers | Simple lens 895 papers |
Trends