FAQ: Frequently Asked Questions
FAQ: Lenses
- 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 for which sensor size a zoom lens was designed?
- 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?
- How to convert lines pairs per millimeter to pixel size?
- 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 in line pairs per millimeter?
- How to convert lines 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 Optics
- How to determine the position of the image of an object point?
- How to tell whether a lens singlet is converging or diverging?