Definition: Focal point; principle focus; point of interest - Photokonnexion
Focal points and focal planes, Gaussian optics
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Focal Distance - International Dictionary of Marine Aids to Navigation
Circle of confusion - Wikipedia
FONSEKA on Twitter: "Focus here! The focal points in a design should stand out but should be noticed after the element with the most dominance. For example, you can create focal points
Can you guess some of the most challenging words in the English language? | The Independent | The Independent
Focal point | optics | Britannica
Examples of Synonyms From A-Z (Plus Worksheet) | YourDictionary
What is a focal point and a focal plane? - Quora
The London encyclopaedia, or Universal dictionary of science, art, literature, and practical mechanics, comprisiong a popular view of the present state of knowledge . in which A is the radiating point from