Archived posting to the Leica Users Group, 2005/01/02
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Don, The publication of measured MTF would help, calculated does not IME. I have tested two lenses, one a multi element zoom, another a prime. The zoom has better (calculated) MTF in the centre of the frame than the prime, but the prime is clearly superior on photographs. I expect there is a MUCH greater variability in multi element lenses simply because of the problem of manufacturing them all the same! OTOH MTF tells nothing about flare resistance or boke, both more important than ultimate resolution on the type of photography I do (I rarely use a tripod and never higher resolution film than Kodachrome and am now using digital) Frank On 2 Jan, 2005, at 03:53, Don Dory wrote: > Jeffery, > There is, it is called a MTF chart. While every machine is different, > if a lens is transmitting 60% contrast at the 30 or 40 cycle line out > 15mm wide open then you have a really good lens. > > If every manufacturer would just publish MTF charts for real production > lenses then most of the nonsense about my lens is better than your lens > houey would stop. > > 0.02 > > Don > dorysrus@mindspring.com