Estimating focal length of lenses

There are several methods one can use to estimate the focal length of a given lens

This methods included:

• Focusing on a distance object
• Using lens formula
• Using non-parallax method
• Using an illuminated object
• Displacement method

Related topics

• Images formed by thin lenses
• Focal length by non-parallax method
• Estimating focal length
• focusing a distance object
• The lens formula
• Linear magnification
• Ray diagrams
• Image formation by thin lenses
• Introduction to thin lenses
• Finding focal length by displacement

---