information about Focal length field
Field Hierarchy
Parent | |||
---|---|---|---|
Biology 34.8M papers | Physics 31.7M papers | Engineering 23.9M papers | Geology 9.1M papers |
Optics 7.9M papers | Paleontology 5.3M papers | Petroleum engineering 466k papers | Lens (geology) 161k papers |
Current | |||
Focal length 13.4k papers | |||
Child | |||
Zoom lens 1,570 papers | Angular aperture 1,007 papers | Simple lens 899 papers |
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