Archived posting to the Leica Users Group, 2010/04/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I believe the folks who use the "Xmm is equivalent to a Ymm on 35mm" use it because 35mm is the only reference they have in their experience. Having used any given lens on many different formats tends to make me put more emphasis on the size of the rectangle behind the lens rather than putting emphasis on the misnomer of 25mm = 50mm on x format. Of course discussing angle of view (or field of view - I guess) of any given lens on any specific size rectangle makes perfect sense. Regards, George Lottermoser george at imagist.com http://www.imagist.com http://www.imagist.com/blog http://www.linkedin.com/in/imagist On Apr 15, 2010, at 1:03 AM, Daniel Tan wrote: > People use it because it's convenient. And easy to understand.