Archived posting to the Leica Users Group, 2000/06/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Looking at some 16x b+w enlargements from shots I made recently in the middle of the night in Dublin's Temple Bar district with my 35 mm Summicron asph fully open using HP5 pushed to 800 in Rodinal 1+25 for 10 mins........ ..... I get the impression that the depth of field with the asph lens is much wider (or larger or deeper or whatever) than with the comparable pre-asph lens. I try to explain this to myself in the following way: if d.o.f. is defined as the area which the lens can render on film meeting certain resolution criteria, then a lens with a higher resolution than another lens (at the same fstop) will automatically have a wider d.o.f. Is this the correct explanation, or is there another one, or am I just trying to find a justification for the lens upgrade? BTW, the Summicron asph is remarkable, sharp as it is fully open. The bokeh is sweet as honey. I do not miss having an extra stop, I'll use the $ 1000 I saved getting a Summicron rather than a Summilux to upgrade one of my other lenses to asph as soon as I can find a demonstrator will full warranty. - -- Christer Almqvist D-20255 Hamburg, Germany and/or F-50590 Regnéville-sur-Mer, France