關於 focal length ，我們在網路上蒐集到這些相關的討論、資訊與評價

#11. Basic Photography 101: Understanding Focal Length in ...

Focal length is the distance (measured in millimeters) between the point of convergence of your lens and the sensor or film recording the image.

#12. What is Focal Length? (And Why it Matters in Photography!)

The focal length of a lens is an indicator of the distance from the subject: the images are all framed the same. Differences arise because the focal length is ...

#13. What is Focal Length in Photography? - How-To Geek

The reason we use focal length to describe lenses is because it tells us one very important thing: what the field of view of that lens will be.

#14. Understanding Focal Length | B&H Explora

The primary measurement of a lens is its focal length. The focal length of a lens, expressed in millimeters, is the distance from the lens's optical center ...

#15. What is Focal Length and Angle of View in photography

Focal distance is the distance between the subject you are focusing to the camera sensor. Lenses that can work at close focal distances have ...

#16. Calculate Lens Focal Length - Wavelength Opto-Electronic

Focal Length & Radius Calculations. Radius of Plano Concave/Convex Lens, All Lens Focal Length, Thin Lens Focal Length. Refractive Index (n)*.

#17. Focal Length | COSMOS - Centre for Astrophysics and ...

The focal length ( f ) is the distance from a lens or mirror to the focal point ( F ). This is the distance from a lens or mirror at which parallel light ...

#18. Focal-length Meaning - YourDictionary

Focal length is the optical distance in millimeters between a camera lens and the sensor or film. It determines the height and width of the scene being ...

#19. focal length - RP Photonics

If a sufficiently large collimated beam of light is incident on the lens, the beam will be focused, and the focal length is the distance from the lens to that ...

#20. Focal Length, Angle of View & Perspective in Photography

Buy the perfect lens for your needs by learning about focal length, angle of view and perspective. Use your lenses more creatively with these fundamentals.

#21. focal length中文(繁體)翻譯：劍橋詞典

Note that computing the focal length requires that the light-refracting properties of the liquids in the eye are taken into account. 來自. Wikipedia.

#22. Focal Length - 鏡頭焦距 - 國家教育研究院雙語詞彙

鏡頭焦距 · Focal Length · 名詞解釋: 無論單透鏡或複式透鏡，都有一定的焦距。當無限遠處的景物在底片感光膠膜上或檢影版面上形成清晰的焦點時，由檢影版面量到鏡頭中心的 ...

#23. Focal Length: An Easy Guide to Using and Understanding ...

Focal length is the distance between the optical center of the lens, and the camera sensor or film plane when focused at infinity. The optical ...

#24. What is lens focal length in photography? | Adobe

The focal length of a lens is the optical distance (usually measured in mm) from the point where the light meets inside the lens to the camera's sensor.

#25. Focal Length: Definition, Equation & Examples - Study.com

The focal length (f) is the distance between the lens and the focal point. Because the focal length measures a distance, it uses units of length, such as ...

#26. A Guide to Understanding Focal Length - BorrowLenses Blog

Focal length is the distance from the front of the lens to the sensor. When a lens focuses light onto a sensor, the light is bent in such a way that it ...

#27. Optical basics - Vision-Doctor

Optical path of a convex lens ... The most important parameters for the calculation are the image field, sensor size, working distance and focal length of the ...

#28. focal length - Wiktionary

The focal point F and focal length f of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror.

#29. HP Series Fixed Focal Length Lenses - NI

高​解析度​成像​鏡頭—​HP 系列​定​焦​鏡頭​提供​多種​焦距​與​版本​選擇，​方便​搭配​最佳​設定​以​獲得​不同​的​工作​距離​範圍。​這些​鏡頭​適用於​需要145 lp/​mm ...

#30. Keywords "focal length" | Keywords | Glossary of TEM Terms

When an electron passes parallel to the optical axis of a lens, the electron intersects with the optical axis at the back focal plane. The "focal length" is ...

#31. What is Camera Focal Length | PhotoModeler

You can think of focal length as the distance between the imaging plane (e.g. the image chip in a digital camera) and a point where all light rays intersect ...

#32. Digital Camera Basic Knowledge Lens

The distance from the center of the lens to the image focal point (=image sensor surface) is known as the focal length. It is expressed in millimeter (mm) ...

#33. Object image and focal distance relationship (proof of formula)

#34. Understanding the Role of Lens Focal Length in Digital ...

Focal length, stated in millimeters, refers to the distance from the center of the lens on your digital camera to the image sensor. Focal length is measured ...

#35. Focal Length Definition - What is Focal Length by SLR Lounge

Focal length is a number expressed in millimeters (mm) that indicates a lens's field (angle) of view. A The number itself refers to the measured distance ...

#36. Focal length - New World Encyclopedia

The focal length of a lens determines the magnification at which it images distant objects. The focal length of a lens is equal to the distance between the ...

#37. Focal length definition and meaning | Collins English Dictionary

Focal length definition: the distance from the focal point of a lens or mirror to the reflecting surface of the... | Meaning, pronunciation, translations ...

#38. Focal length Definition & Meaning | Dictionary.com

Focal length definition, the distance from a focal point of a lens or mirror to the corresponding principal plane. Symbol: f See more.

#39. Focal Length Definitions | Canon Australia

The focal length of a lens changes the angle of view which impacts the image that is ultimately captured. A shorter focal length will have a wider angle of view ...

#40. Focal length Definition & Meaning - Merriam-Webster

The meaning of focal length is the distance of a focus from the surface of a lens or curved mirror.

#41. Camera Focal Length and the Perception of Pictures - NCBI

Depth compression and expansion with different focal lengths. A) Left panel: wide-angle effect (short focal length). This picture was taken with a 16mm lens ( ...

#42. Understanding Lenses: What is Focal Length? - The Beat

Focal length is the measurement (in millimeters) from the optical center of a camera lens to the camera's sensor. The optical center is also ...

#43. Investigation: focal length - Lenses - CCEA - GCSE Physics ...

Illustration showing how to measure the focal length of a converging lens using a distant object. Point the lens at a distance object outside the window ...

#44. Camera lenses & focal length. What are the numbers on a lens?

The focal length is one of the defining characteristics of a lens as this determines the angle of view as well as magnification. How focal length is determined ...

#45. What is Focal Length and Which Lens Should I Use? - Coles ...

A lens focal length is generally represented in millimeters, usually abbreviated as mm. This tells us the angle of view or view of field for a given focal ...

#46. Liquid-crystal lens with a focal length that is variable in a wide ...

Focal Length. In a large voltage range the LC lens preserves its optical quality and phase retardation ϕ ∼ aρ 2. Then the focal length (in ...

#47. Understanding Focal Length and How to Use It - Adorama

Focal length is the distance measured in millimeters, between the optical center of the lens and the camera sensor, where the light information ...

#48. Understanding Focal Length and Field of View - Vision ...

The focal length of a lens defines the lens's angular field of view. For a given sensor size, the shorter the focal length, the wider the ...

#49. The Focal Length Divergence Measurement Method - Ophir ...

Any divergent beam that is the same spot size at the focal length (not the focus), the divergence is equal as seen by the parallel rays before the lens. All ...

#50. Understanding Camera Lenses - Cambridge in Colour

The aperture range of a lens refers to the amount that the lens can open up or close down to let in more or less light, respectively. Apertures are listed in ...

#51. DSLR Camera Basics: Understanding Focal Length - Lifewire

The scientific definition of focal length goes like this: When parallel rays of light hit a lens focused at infinity, they converge to form a ...

#52. Fixed Focal Length | VS Technology

Fixed Focal Length |VS Technology's Fixed Focal lens lineup consists of bright, compact, high resolution, and megapixel lenses for Vision System and Machine ...

#53. focal length_百度百科

focal length 是一个专业名词，中文名为焦距，指的是光学系统中衡量光的聚集或发散的度量方式，指从透镜中心到光聚集之焦点的距离。亦是照相机中，从镜片中心到底片 ...

#54. Understand Focal Length in 5 Minutes - Improve Photography

The focal length measurement tells the photographer what the angle of view will be. The angle of view means how wide of an area is visible in the picture. It ...

#55. Focal Length and Angle of view - Nikon support

The focal length of the lens is the distance between the lens and the image sensor when the subject is in focus, usually stated in millimeters ( ...

#56. focal length - Longman Dictionary

focal length meaning, definition, what is focal length: the distance between the centre of a len...: Learn more.

#57. Focal Length - Digital SLR Guide

Focal length is measured in millimeters (mm) and it represents the distance from the optical center of a lens to the digital camera sensor when the subject ...

#58. How the 50-mm Lens Became 'Normal' - The Atlantic

However, lenses aren't measured by perspective or by angle of view—they're categorized by focal length, the distance between the center of ...

#59. Scripting API: Camera.focalLength - Unity - Manual

The camera focal length, expressed in millimeters. To use this property, enable UsePhysicalProperties. Did you find this page useful? Please give it a rating:.

#60. Focal length - Delta

Focal length is a distance between an optical focus of an optical system and a cardinal point of the optical system in millimeters and is defined as the ...

#61. FOCAL LENGTH (noun) definition and synonyms - Macmillan ...

Definition of FOCAL LENGTH (noun): distance from centre of lens to focal point.

#62. Definition of Focal Length | Chegg.com

Similarly, for concave lens, the focal length is a distance where the parallel rays will diverge. The ray diagram for the position of focal length of a convex ...

#63. Focal length - Oxford Reference

In optics, the distance from the middle of the lens to its focal point. Light rays run in parallel to one another, while lenses distort light rays: a convex ...

#64. Design of a twenty-element long focal length zoom lens - SPIE ...

Twenty optical elements were needed to provide for the 345- to 1050-mm focal length zoom range as well as the proper color correction over the visible ...

#65. 4 Things You Should Know About Focal Length and ...

Lenses are the eye of your camera. The focal length of a lens (and your point of view) determine how much of the subject.

#66. Lens Selector - Basler AG

Our lens selector supports you in the selection of the right lens for your Basler camera. ... Option 3: Focal length (and working distance optional).

#67. Focal Length | Formula, Definition, Diagrams - Toppr

Read formulas, definitions, laws from Spherical Mirrors here. Click here to learn the concepts of Focal Length from Physics.

#68. Focal length - The Free Dictionary

The distance of a lens or mirror to its focal point. Also called focal distance, focus. American Heritage® Dictionary of the English Language, Fifth Edition.

#69. What is focal length in photography - 5 facts | The Lens Lounge

The focal length of a lens used on a digital camera, is the distance between the focal point of a lens and the sensor when the subject is in focus.

#70. Focal Length Lens - Best Buy

One of the most important considerations for a photographer is the focal length of the lens that he or she uses. The focal length of a camera lens affects ...

#71. The Impact of a Lens' Focal Length on a Vision System

Let's explore the impact that the lens's focal length can have on a system using machine vision. Working Distance and Field of View ...

#72. Optics technical overview | STEMMER IMAGING

Focal length, Field of view, Depth of field, Working distance The focal length and aperture of a lens are usually included in the product name of a lens.

#73. Understanding Focal Lengths in Landscape Photography | Ic...

The focal length is extremely important because it represents the field of view of your lens – that is, what you will see through it when capturing an image.

#74. A Technique to Measure Focal Length of a Lens with no Bulk ...

Abstract: This paper presents a motion-free technique for characterizing the focal length of any spherical convex or concave lens.

#75. What is focal length? | Clipchamp Blog

Whether you're a photography or videography beginner or just need a refresher, everything you need to know about focal length is here. Man ...

#76. Lens Focal Length - Exposure Therapy

Technically, the focal length is the distance between the secondary principal point (commonly and incorrectly called the optical centre) and the rear focal ...

#77. The value of the focal length of the lens is equal class 12 ...

Lens formula is the same for concave lenses as well as for convex lenses. It is mention in question that focal length = image distance or f=v …(2) Using ...

#78. Imaging Basics - Calculating Lens Focal length - 1stVision Inc.

The first being an industrial camera and second, a lens to acquire the given image. In many cases, our working distance of our lens is ...

#79. How to Calculate Focal Length of a Lens - Sciencing

Lenses may be convex, concave or a combination. The type of lens impacts the focal length. Calculating the focal length of a lens requires ...

#80. Ask the staff: Pick one focal length or lens to rule them all

Even today, after using lens after lens and camera after camera for review after review, the 35mm focal length remains my go-to. It doesn't ...

#81. File:Focal-length.svg - Wikimedia Commons

My previous change also required a change in the focal point (F) and focal distance (f) in the resulting convex lens. Have now corrected for ...

#82. Focal length - Definition for English-Language Learners from ...

Definition of focal length written for English Language Learners from the Merriam-Webster Learner's Dictionary with audio pronunciations, usage examples, ...

#83. focal length中文 - 查查在線詞典

focal length 中文::焦距…，點擊查查權威綫上辭典詳細解釋focal length的中文翻譯，focal length的發音，音標，用法和例句等。

#84. focal length - 英中– Linguee词典

In addition, if you enter information such as lens name, focal length, and f-aperture in the lens information entry area of My Settings editing, ...

#85. The Power of Focal Length Blending in Landscape Photography

Simply put, focal length blending is a technique where the photographer captures two, or more, images with different focal lengths and blends them together in ...

#86. Understanding Focal Length and Angle of View - Photography ...

Focal Length is the measurement of the optical center of the lens to the film plane. Lenses come in different “focal lengths,” and more and more, ...

#87. Guide to Focal Length in Photography (+ 7 FAQs) - Shotkit

Focal length is the system used in photography to describe how wide or tight a lens is. Listed as a number and measured in millimetres — e.g., 35mm, ...

#88. Focal Length and F-Stop Explanation - Paragon Press

In other words, focal length equals image distance for a far subject. To focus on something closer than infinity, the lens is moved farther away from the film.

#89. Focal Length Images, Stock Photos & Vectors | Shutterstock

Find focal length stock images in HD and millions of other royalty-free stock photos, illustrations and vectors in the Shutterstock collection.

#90. Measuring the focal length of a camera lens in a smart-phone ...

Measuring the focal length of lenses is a basic physics experiment in ... A ruler is placed a distance of –u away from the camera lens, ...

#91. Changing focal length and camera distance to maintain ...

Focal length can be defined as the distance between the camera lens and the camera sensor, providing variance in the viewing angle and magnification of objects ...

#92. Choose the Right Focal Length Lens for a Shoot - PAVILION ...

A variable focal length lens (VFL), more commonly called a zoom lens, can change focal lengths within a certain range, thereby changing the ...

#93. Lens Overview

Focal length 50mm is the standard or normal focal length, because a 50mm lens (for 35mm cameras) covers approximately what human eyes can see. A smaller focal ...

#94. Focal Length Explained | digiDirect

Focal length is a measurement; specifically, it's the measurement between the lens itself and the image sensor when the subject of your photograph is in focus.

#95. Optical Bench (Focal Length) - CSUN

150 mm Focal Length Convex Lens; 50 mm Focal Length Spherical Mirror. Cautions: Handle lenses and mirrors by the edges only. It's a lot easier to keep these ...

#96. focalLength | Apple Developer Documentation

In a physically based camera, field of view is based on the focal length of the lens and the vertical aperture of the imaging surface (film or sensor). Changing ...

#97. How focal length affects the shape of the face - Red Bull ...

Dan Vojtech's portraiture recommendations. What is the best focal length for a portrait? How do you go about answering such a question? Easy.