關於 focal lens ，我們在網路上蒐集到這些相關的討論、資訊與評價

#11. 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 ...

#12. 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. Graphic ...

#13. Focal Length of a Lens - Hyperphysics

The principal focal length of a lens is determined by the index of refraction of the glass, the radii of curvature of the surfaces, and the medium in which the ...

#14. Focal Length Definitions | Canon New Zealand

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 ...

#15. Long Focal High Resolution Lens for φ48mm

∞ F No. Focal Length, WD. TV distortion. Maximum Compatible sensor. Mount, Dimension. LSF10528-F. 0.3x. 2.8. 105mm ...

#16. Understanding Camera Lenses - Cambridge in Colour

This tutorial aims to improve understanding by providing an introductory overview of concepts relating to image quality, focal length, perspective, prime vs.

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

Calculate Lens Focal Length. Focal Length & Radius Calculations. Radius of Plano Concave/Convex Lens ... Focal Length (mm). For the glass materials list, ...

#18. 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) ...

#19. 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 ...

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

LC lenses are optical lenses made from LC materials with appropriate electrode structures. A LC lens has the advantage of a focal length that can be varied by ...

#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 - 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 ...

#23. Focal-length Meaning - YourDictionary

Focal -length meaning · The distance from the optical center of a lens or curved mirror to the point where light rays from a very distant object converge. · The ...

#24. 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.

#25. EZ way to find focal length of CO2 laser lens - Ophir Optronics

#26. Focal Lens Images FLI Photo & Video LLC

Cincinnati Ohio based traveling wedding photographer. Five star ratings. Customizable packages.

#27. Vari-focal Lens - Module - Product - RAYS Optics Inc.

Application. Rays Optics is a leading supplier of vari-focal lenses , a variety of wide field of view and high performance features is ready for demanding ...

#28. 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 ...

#29. 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.

#30. 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 ...

#31. 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 ...

#32. 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 ...

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

What Does the Focal Length of a Lens Mean?

#34. 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 ...

#35. 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 ...

#36. Optical basics - Vision-Doctor

The focal length is given in millimetres and is the distance between the optic centre of a lens and the focal point. All rays of light inciding in parallel ...

#37. What is Camera Focal Length | PhotoModeler

Strictly, the Principal Distance is the distance mentioned above (i.e. distance from imaging plane to the lens optical sensor), and the focal length is the ...

#38. Machine Vision Lenses | Mega Pixel Fixed Focal Lens | 4/3inch

Machine Vision Lenses · Tokina Home »Security Products »Machine Vision Lenses » Mega Pixel Fixed Focal Lens » 4/3inch ...

#39. focal lens - 英中– Linguee词典

Focal length lens is similar to the size of the focal length imaging lens; called short-range lens focal length is less than the imaging size, short focal ...

#40. 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 ...

#41. 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 ...

#42. Which Camera Lens to Use? An Introduction to Focal Length...

Usually measured in millimetres, focal length is a calculation of the distance between the converging rays of incoming light from the lens (focal point) and the ...

#43. 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 ...

#44. Double Convex Lens, 100mm Focal Length, 2" (50mm ...

Double Convex Lens, 100mm Focal Length, 2" (50mm) Diameter - Spherical, Optically Worked Glass Lens - Ground Edges, Polished - Great for Physics Classrooms ...

#45. 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).

#46. 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 ...

#47. Zoom vs. Fixed Focal Length (Prime) Canon Lens - The Digital ...

Is a zoom lens or a prime (fixed focal length) lens the best choice? Let us help you determine what is right for you.

#48. What Is the Best Focal Length? 5 Important Focal Lengths to Try

What focal length is best for your photos? We share five amazing focal lengths (and explain when to use them).

#49. 12MP Lens 10.5 mm to 42 mm Vari-focal Lens - Dahua ...

Focal Length : 10.5 mm to 42 mm; Aperture: F1.5; Field Angle: W: 46.9° x 37.2° x 27.6°, T: 14.2° x 11.2° x 8.4°; M.O.D.: 0.3 m; TV Distortion: -3 % (Wide) ...

#50. Lens Overview

The on-camera zoom lens covers focal length 8mm to 24mm as marked on the lens: The 35mm equivalent of 8mm-24mm is 38mm-115mm, which covers not-so-wide-angle to ...

#51. 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 ...

#52. Lens Calculator | Focal Length | Working Distance | Field of View

Find the right lens quickly & easily with the Kowa lens calculator. Calculate focal length, field of view or working distance. Calculate here.

#53. Reikan FoCal - Automatic Focus Calibration Software

Reikan FoCal - Get the very best from your camera and lenses with the only automatic focus calibrator!

#54. Lens Datasheet High Resolution Fixed Focal Length

Our TECHSPEC® High Resolution 5 Megapixel Fixed Focal Length Lens- es are available in multiple focal lengths and feature multiple versions.

#55. Focal Fixed Lens Latest Price, Manufacturers & Suppliers

Find here Fixed Focal Lens, Focal Fixed Lens manufacturers, suppliers & exporters in India. Get contact details & address of companies manufacturing and ...

#56. 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, ...

#57. Focal Camera Lenses for sale | eBay

Get the best deals on Focal Camera Lenses when you shop the largest online selection at eBay.com. Free shipping on many items | Browse your favorite brands ...

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

The comparison of normal vision with focal length, rather than other forms of measurement, persists because of how lenses came to be produced ...

#59. Lens basics for your camera - focal length, macro, wide-angle ...

Prime lenses only have one focal length, for example, a 60mm lens is a prime lens. underwater photography basics. Pipefish, taken with a Nikon D810, Nikon 105mm ...

#60. Camera Lenses for Machine Vision - Thorlabs, Inc.

Features · Lenses with Fixed Focal Lengths of 3.5 mm to 100 mm · Zoom Lens with Focal Length Range of 18 mm to 108 mm · High-Resolution (10 Megapixels) Fixed Focal ...

#61. 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 ...

#62. Lens Focal Length: Normal, Short, Long, Special Lenses

Lens focal length is the most important characteristic of a lens. One of the prime advantages of a single·lens reflex camera or a view ...

#63. 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 ...

#64. Lens Focal Length 25mm | PCE Instruments

Lens Focal Length 25mm . - Resolution: 5 megapixels - Focal Length: 25 mm - Thread size: 3/4 " - Picture angle: 15 ° / 20.5 ° / 25.8 ° - Resolution: 5 ...

#65. 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 ...

#66. 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 ...

#67. 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.

#68. 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.

#69. CCTV Lens (Focal Length 3 to 100 mm) - MiSUMi

CCTV Lens (Focal Length 3 to 100 mm): for Under 1 Million Pixels from MISUMI. MISUMI offers free CAD downloads, prompt lead times, competitive pricing, ...

#70. Fixed Focal Lengh Lens Comparison List.pdf - 1Vision

Fixed Focal Length Lensseries. Large variety of focal lengths(11models) f=3.5mm / 4.5mm / 6mm / 8mm / 12mm / 16mm. / 25mm / 35mm / 50mm / 75mm / 100mm.

#71. How to choose the right camera lens focal length for your ...

Every lens focal length has its own time to shine, and it's not just about how much of the scene it captures. The best focal length is the one that best ...

#72. Fixed Focal Length Lenses Suppliers | Photonics Buyers' Guide

Find Fixed Focal Length Lenses suppliers with the Photonics Buyers' Guide. Details for all companies and products provided to help you make an...

#73. 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 ( ...

#74. 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 ...

#75. Lens Focal Length Defined and Explained | Photzy

True or False: Focal length refers to the physical length of the lens barrel. True or False: “Long” focal length lenses have a wide angle of view. What angle of ...

#76. Liquid-Crystal Lens-Cells with Variable Focal Length

Liquid-crystal cells shaped like a plano-convex lens or a plano-concave lens are prepared. The focal length can be varied from the value fe for an ...

#77. Focal lengths and focal points

Lenses can focus light and make images in a very similar way to mirrors. Lenses are either converging (convex on both sides, or concave on one side but more ...

#78. 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 ...

#79. Tube Lens Focal Length | Nikon's MicroscopyU

This interactive Java tutorial explores the effect of tube lens focal length on the angle of off-axis light rays in microscopes with infinity-corrected ...

#80. Focal length - The Free Dictionary

focal length. n. Abbr. f. The distance of a lens or mirror to its focal point. Also called focal distance, focus.

#81. Camera Lens Focal Lengths: What All the Numbers Mean

Wide angle lenses can be considered as lenses with a shorter focal length than normal. Since we're defining 50mm as normal, then the previously ...

#82. Tunable Soft Lens of Large Focal Length Change - Mary Ann ...

Tunable lens technology inspired by the human eye has opened a new paradigm of smart optical devices for a variety of applications due to ...

#83. 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 ...

#84. The focal length of lens is positive. - Toppr

The focal length of a convex lens is positive according to sign convention as the light rays converge on the opposite side from where the light ray is ...

#85. Which Lens Should I Use? | Focal Length Comparison

Most people probably learn focal length first as how “zoomed in” a lens looks. At 16mm, the lens is very “zoomed out” or wide. At 200mm, the ...

#86. Each type of camera lens explained | photoGuard

Here are 6 of the main types of camera lens and the best time to use them · What types of camera lenses are there? · Focal length size guide · What are the main ...

#87. 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 ...

#88. Fixed Focal Length Lenses | VS Technology

Fixed Focal Length Lenses. Originally developed for surveillance purposes, the WD was designed to work up to infinity.

#89. 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 ...

#90. Electrowetting lens with large aperture and focal length tunability

Focal length is one of the main properties of a liquid lens. Similar to the solid lens, the focal length of the liquid lens is also based on the ...

#91. Prime Lenses: One Focal Length, Many Benefits

What do you gain? Aa prime lens is one that can't be zoomed. So it only has one single, fixed focal length, and an unchanging angle of view ...

#92. 35mm-equivalent focal length (Interchangeable-lens Digital ...

The lens focal length in terms of the EF lens' 35mm-equivalent focal length is as follows. Model Name 35mm-Equivalent Focal Length Image sensor size EOS M3 ...

#93. Photography 101: Focal Lengths and Choosing the Right Lens

There are two types of camera lenses: fixed focal length (also called prime lenses) and zooms. Most compact cameras, whether point-and-shoot or more ...

#94. Understanding Cameral Focal Length for the Best Results

Understanding Camera Focal Length · The shorter the focal length, the wider your angle of view will be–meaning you will be able to fit much more ...

#95. Electrically Tunable Lenses: A Review | Robotics and AI

Focal Length Tuning Strategies. An electrically tunable lens, or “smart lens”, is here defined as a light focusing medium ( ...