focal length

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  • noun

Synonyms for focal length

the distance from a lens to its focus

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References in periodicals archive ?
The FUJINON HF-XA series are high-performance fixed focal length lenses with supporting 3-megapixels 2/3 sensor format.
To have the option of taking wide-angle and telephoto pictures, you needed other lenses of fixed focal lengths.
Repeated measures ANOVA, with one within subject factor (eye) and no between subject factors, with a Tukey/Kramer post-hoc test, was used to determine differences between the focal lengths of the different eyes.
angle lens equivalent to a 24mm focal length or wider is absolutely essential for controlling perspective.
Yet Stork determined the probable focal length of a concave mirror made by inverting and silvering the convex mirror shown in the painting.
Although capable of focal lengths ranging from wide-end to tele-end, and subject distances ranging from infinite to extreme close-up, the HJ17ex6.
Its compact body has an elegant design, and is equipped with a 5x optical zoom (up to 10x* with Dynamic Fine Zoom) NIKKOR lens that supports focal lengths beginning at the wide-angle 24 mm (equivalent focal length in 35mm 135 format) and a maximum aperture of f/2.
A choice of three interchangeable V-mount lenses in 15-mm, 20-mm and 25-mm focal lengths optimizes image size, while a C-mount adaptor allows easy attachment to any standard colposcope or microscope.
5-300 mm covered by the new zoom lenses represents the most frequently used focal lengths in theatrical motion picture production, a range that often requires a combination of three or more separate zoom lenses.
The P610 is a model that supports full-scale photography with a 60x optical zoom (up to 120x*1 when Dynamic Fine Zoom is used) NIKKOR lens that covers the wide-angle 24 mm to super-telephoto 1440 mm angles of view (equivalent focal lengths in 35mm 135 format), Dual Detect Optical VR, which offers the best compensation for camera shake equivalent to a 5.
Up to now, telescope mirrors have generally had focal lengths much longer than their diameters.
The ExpoAperture2 Depth-of-Field Guide has been improved to easily compensate for a camera's sensor or film size and to simplify its use over a wider range of focal lengths.
1-million pixels, and is equipped with an 8x optical zoom NIKKOR lens that covers the wide-angle 25 mm to telephoto 200 mm angles of view (equivalent focal lengths in 35mm 135 format), and utilizes Dynamic Fine Zoom to increase zoom capability up to approximately 16x.
Utilizing a precision zoom lens, which offers continuously changing focal lengths to adjust magnification while maintaining focus, is typically preferred over using a fixed telecentric lens which may offer only one magnification.