PDA

View Full Version : Difference between 23 mm and 35 mm



harishkumar09
06-03-2007, 07:24 PM
I own a Canon A540.It is mentioned as an 23 mm on it.But we see that most film camera is 35 mm.DSLRs are also almost 35 mm.Now I want to know what will be the difference in shooting something with a 23 mm and 35 mm ?

John_Reed
06-03-2007, 07:37 PM
I own a Canon A540.It is mentioned as an 23 mm on it.But we see that most film camera is 35 mm.DSLRs are also almost 35 mm.Now I want to know what will be the difference in shooting something with a 23 mm and 35 mm ?But I did find an A550, with the following lens data: "5.8-23.2mm (35-140 35 mm equiv) 4.0x optical zoom." If that's the "23mm" you're referring to, notice the "(35-140 35 mm equiv)" bit following the actual range of lens focal lengths which are printed on the lens. What this means is that your camera has a sensor that's much smaller than 35mm film, so the lens focal lengths get scaled up by the sensor size difference to come out 35-140 in "35 mm equiv" focal lengths. So at 23mm, your camera compares to a 35mm camera shooting at 140mm focal length.