click here for some info.
There's a multiplication factor because the lens is 50mm when the size of sensor is 35mm, however, on most dSLRs such as the 20D, the sensor size is smaller than 35mm which means creates a multiplication factor.
Galaxy Note 8 vs iPhone X
Awful clip art from 1994 is being tweeted every hour by a bot
iPhone X vs Samsung Galaxy Note 8
Les meilleurs navigateurs internet 2017