thanks, that's perfect !
+ jack impressions... i will go for an SK !
80 AF: Older standard version had sample variation and the cheap body and AF ring, but very good performers in general -- like the 55 above. The D version is notably better with improved contrast and improved corner performance at the wider apertures.
80 LS: First impression was, "Oh yeah!" It has a more classic Schneider rendering -- very sharp and contrasty wide open in the center, with the extreme corners gently fading off in sharpness with a creamy bokeh. Stopping down one moves the sharpness out further, and stopping down two leaves it sharp and contrasty corner to corner. Stopping down 3 or 4 (f8 and 11) are the prime apertures for outstanding corner to corner sharpness and contrast.