Archived posting to the Leica Users Group, 1999/07/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Christer Almqvist wrote: > > >In Erwin's comparison of the 35 Asph. Lenses and the last 35 Summicron-M he > >writes: > > > >*It seems as if the Summilux-M ASPH 35mm is a Summicron-M 35mm with one full > >stop more.* > > > >Any comments? > > True. But: > > a/ The ASPH is 'sharper' than the spheric with both fully open, i.e. with > one at 1.4 and one at 2.0. I am not able to decipher this. Which Lenes are you talking about? There are three lenses in question. > b/ With both at 2.0, the ASPH is much sharper than the spheric. Which two Lenes are we talking about? > c/ I can see no real diff from 2.8 onwards. NO clue. I admit it. sorry. > > -- > christer almqvist Christer I apologize if it is my mental block but I have not the slightest clue what you are talking about as I indicated above. There are three lenses in question. So I quote Erwins Puts's info below. From http://www.imx.nl/photosite/leica/m/lenses/pages/l11879.html Summicron-M ASPH 35mm gives a high contrast image with excellent micro contrast and a crisp rendition of extremely fine detail from center to the well into the outer zones. Light fall off is noticeable, but restricted to a very small zone. Flatness of field is outstanding as is the definition over the whole image area. Summilux-M ASPH 35mm also gives this same performance, but the finest details are rendered a fraction softer at the edges. The difference between Summicron-M ASPH 35mm is the coverage over the image field. Center sharpness is a mite better with Summilux-M ASPH 35mm, but this lens loses more detail when going to the outer zones. This is visible at 30 times enlargement. So it is not easy to say which lens is better. I would prefer to call it a difference in fingerprint or characteristic of image rendering. Summilux-M ASPH 35mm follows the classical* pattern of extremely high center quality, becoming less so when going outwards. Summicron-M ASPH 35mm is a new pattern concentrating on even coverage over most of the field. The difference between the center performance of Summicron-M ASPH 35mm and Summilux-M ASPH 35mm are in my view slightly academic, but they are there to note (on the bench at least!).