This was one of the hardest concepts for me to grasp, and this video did a great job separating the concepts to make it simpler. https://www.youtube.com/watch?v=4CoEsqePADw The following article also did a great job contrasting the lenses that photographers actually have to purchase (zoom lens, prime lens): https://www.nikonusa.com/en/learn-and-explore/a/tips-and-techniques/understanding-focal-length.html
This was one of the hardest concepts for me to grasp, and this video did a great job separating the concepts to make it simpler. https://www.youtube.com/watch?v=4CoEsqePADw The following article also did a great job contrasting the lenses that photographers actually have to purchase (zoom lens, prime lens): https://www.nikonusa.com/en/learn-and-explore/a/tips-and-techniques/understanding-focal-length.html