short focal length lens (=short-focus lens)

short focal length high aperture lens

graded focal length lens

long focal length lens

long focal-length lens

telephoto lens focal length

Thermal Lens Focal Length

variable focal length lens

long or short length

rigid length-short-pile

S type thermocouple with short length

short focal distance therapy

short length scale disturbance

short short story

short-length shear wall-tube

short-short

adjusting focal length

amended focal length

automatic focal length