equivalent focal length

Also found in: Medical, Acronyms, Encyclopedia

0.01 sec.

(Physics / General Physics) Optics the ratio of the size of an image of a small distant object near the optical axis to the angular distance of the object in radians

The distance measured along the optical axis of the lens from the rear nodal point to the plane of best average definition over the entire field used in a camera. See also focal length.

How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.

?Page tools

Printer friendly
Cite / link

Feedback
Add definition

Mentioned in	?		References in periodicals archive	?		Dictionary browser	?		Full browser	?
calibrated focal length relative aperture			Lens: A good quality telephoto lens with a focal length of 210mm or a zoom lens with an equivalent focal length is recommended. How to photograph hummingbirds by Mathes, George E.; Stouffer, Anita / PSA Journal 6x conversion factor inherent in the APS-C sized sensor, the high zoom ratio of this EF-S 55-250mm lens actually achieves the equivalent focal length of 88-400mm (in 35mm format). Canon U.S.A.'s New EOS Rebel XSi Places Superior Optics and ... by Business Wire 5in 230k LCD monitor, RAW mode shooting and a massive 18x Leica zoom lens with optical image stabilization and a 28-504mm equivalent focal length range. The Panasonic Lumix DMC-FZ18 Digital Camera Features and Information by Peter Sams / Electronics community			Equisetum variegatum Equisonance Equisonant equitable equitableness equitably Equitancy equitant equitation Equitemporaneous equites equities equity equity capital equity credit line equity of redemption equity-linked policy equiv. equivalence equivalence principle equivalence relation equivalency equivalent equivalent air speed equivalent circuit equivalent focal length equivalent weight equivalent word equivalent-binary-digit factor Equivalently Equivalue Equivalve Equivalvular equivocacy equivocal Equivocal chord equivocality equivocally Equivocalness equivocate equivocation Equivocator Equivocatory equivoke equivoque Equivorous Equuleus Equus Equus asinus Equus Burchelli Equus caballus			Equivalent Continuous Noise Level Equivalent Continuous Sound Level Equivalent Continuous Sound Level Equivalent Current Dipole Equivalent Current Method Equivalent Degrees of Freedom Equivalent Designers Cost Analysis System equivalent diameter Equivalent Direct Radiation Equivalent Distillation Capacity Equivalent dose Equivalent dose Equivalent dose Equivalent dose Equivalent Double Layer equivalent duct diameter Equivalent Dwelling Unit Equivalent Effective Stratospheric Chlorine Equivalent electrical circuit Equivalent electrical circuit equivalent electrons equivalent elements equivalent embedment length equivalent equations equivalent evaporation Equivalent Fare Paid Equivalent Field Office Equivalent Fixed Barrier Speed Equivalent Flight Hours equivalent focal length equivalent footcandle Equivalent Forced Outage Rate equivalent four-wire system Equivalent Frame Method Equivalent Full Charge Equivalent Full Load Hours Equivalent Full Power Hours Equivalent Full Power Level Equivalent Full Time Equivalent Full Time Student Equivalent Full Time Student Load Equivalent Full Time Student Unit Equivalent Full-Time Employee Equivalent Full-Time Person/People/Placement Equivalent Generalized Impedance Boundary Condition equivalent given for injury equivalent given for loss sustained Equivalent Granular Thickness equivalent head wind equivalent height Equivalent Hertz Equivalent Hydraulic Diameter Equivalent Identification equivalent inequalities

Dictionary, Thesaurus, and Translations

Free Tools:	For surfers: Free toolbar & extensions \| Word of the Day \| Help For webmasters: Free content \| Linking \| Lookup box \| Double-click lookup \| Partner with us

Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.