Digital Lens Multiplier Effect Calculator
To calculate the perceived focal length change of a 35mm lens on a digital camera body, enter the advertised focal length of the lens, and select a camera body from the pull-down menu.
*Because of digital cameras' smaller sensors compared to 35mm film, 35mm lenses mounted on digital cameras appear to increase their focal length due to Field of View Cropping. For example a 50mm lens mounted on a digital SLR with a 1.5x multiplication factor acts like a 75mm lens. Explain this.