Focal Length and Frame Rate

 FOCAL LENGTH AND FRAME RATE

1. What is focal length?

Focal Length indicates the distance between the centre of a lens and its focus point in millimetres. 

2. What is the visual difference between a low mm lens and high mm lens?
A lens with a short focal length gives you a wider field of view.  The higher the mm number on your lens the more narrow the view will be

3. When do you use a lower mm focal length? When do you use a higher focal length? 
Lower mm focal length is used to photograph wider field view such as landscapes. Higher mm focal length is used to photograph close ups and smaller vignette in a landscape scene.

4. Visual examples of low & high mm focal lengths














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