OptoWiki Knowledge Base

The Knowledge Base for Technical Optics

Skip to content
  • Home
  • Glossary
  • Blog
    • Can I increase the DOF by changing the focal length, if FOV and brightness are constant?
    • Little siblings: s-Mount lenses as replacement for c-mount lenses
    • Comparison: c-mount lenses vs. s-mount lenses (M12x0.5)
  • Book
    • Chapter 01: Introduction
    • Chapter 02: Basics
    • Chapter 03: Hostile Brothers – incompatible properties of lenses
    • Chapter 04: Dangerous Half Knowledge
  • FAQ
    • FAQ : Objectives
      • Why do we use the focal length to describe a lens and not the viewing angle?
      • What’s the difference between zoom lenses and vario lenses?
      • How to tell which sensor size a zoom lens was designed for?
      • Can s-mount lenses replace c-mount lenses in general?
      • Can s-mount lenses be as good as c-mount lenses?
      • What are the features of rear converters?
      • What is the CRA (chief ray angle)?
    • FAQ: Practice
      • How to calculate the length of needed distance rings?
      • How to focus a lens at two distances at once?
      • How to determine the focal length that results in a 1:1 mapping?
    • FAQ: Resolution
      • How to read an USAF1951 target?
      • Why can color cameras use lower resolution lenses than monochrome cameras?
    • FAQ: Conversion
      • How to convert diopters to focal length?
      • How to convert focal length to diopters?
      • How to convert pixel size to line pairs per millimeter?
      • How to convert line pairs per millimeter to pixel size?
      • How to convert Numerical Aperture to F-Number?
      • How to convert optical inches to image circle diameter?
      • How to convert pixel count and size to Inches?
    • FAQ: Geometrical Optic
      • How to determine the position of the image of an object point?
      • How to tell whether a lens singlet is converging or diverging?
  • Trouble Shooting
    • Symptom: Colors different on left and right side
    • Symptom: Field Of View changes from lens to lens
    • Symptom: I can’t focus my lens to infinity
    • Symptom: Image is darker at the Rim of Bandpass Filters
    • How to convert pixel size to line pairs per millimeter?
    • Symptom: Low Contrast when using Telecentric Lenses of Coax Type
    • Symptom: Pink Image
    • Symptom: Purple rim around dark objects
    • Symptom: Unsymmetrical Image Brightness
  • Calculators

FAQ: Practice

  • How to calculate the length of needed distance rings?
  • How to focus a lens at two distances at once?
  • How to determine the focal length that results in a 1:1 mapping?

Language

de_DEen_US

Recent Posts

  • What happens when you focus lenses from infinity to shorter distances?
  • What’s the relationship between the main features of a lens?
  • About the Sense and Nonsense of Resolution
  • Why Megapixel? Lenses don’t have a Pixel-Structure after all!
  • Can I increase the DOF by changing the focal length, if FOV and brightness are constant?

Recent Comments

    Categories

    • c-mount
    • Lens Types
    • Practice
    • s-mount
    • Uncategorized

    Meta

    • Log in
    • Entries feed
    • Comments feed
    • WordPress.org

    Other

    • Impress
    • Cookie Policy (EU)
    Proudly powered by WordPress
    Manage Cookie Consent
    We use cookies to optimize our website and our service.
    Functional Always active
    The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
    Preferences
    The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
    Statistics
    The technical storage or access that is used exclusively for statistical purposes. The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
    Marketing
    The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
    Manage options Manage services Manage vendors Read more about these purposes
    View preferences
    {title} {title} {title}