The Camera - Focal Length and Frame Rate

 The focal length of a lens is the optical distance from the point where the light meets inside the lens to the camera's sensor. 


The lower the focal length number the wider angle (zoomed out) view one can attain. The higher the mm number of the lens, them more narrow (zoomed in) the picture/subject is going to be. 



One needs to use a lower mm focal length if they are trying to get everything into the picture, like a landscape, where you need to capture everything instead of just the river or just a rock. A higher mm focal lens is used when there is only one subject in the picture that needs to be focused on, like a portrait, or an athlete playing a sport. 

Low and High focal lengths (DSLR pictures):



Frames per second or FPS is a rate at which back to back images called frames appear in a display and form moving imagery. 

Capturing images at a higher frame ensures a higher level of detail and clarity for the amount of motion captured. A higher frame rate also produces a smoother image/video which allows for more flexibility when editing the footage.  

 

A majority of films are shot in 24 fps, because while humans are capable of dealing with a variable frame rate, they are incapable of dealing with a variable sound rate. So 24 fps had the perfect balance as it had a steady rate in both visual and audio aspects. 



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