> I use once and also the Pentax 135mm 2.5 lens to photo same > subject on same film by changing lens on camera. The Vivitar is > OK, but the colors produced by Pentax lens were more saturate less > washed out. Cannot comment on the sharpness because didn't check > that. Also, the Pentax handled for me better - the feeling of > focus was more smooth.
I agree that SMC beats VMC - no surprises there. It is hard to beat the color saturation of most of the Pentax primes that I have ever used. In particular, the K 135/2.5 and the A* 135/1.8 both have stronger colors than does the VS1 135/2.3 (which is still a good lens, optically, nonetheless). However, I have to disagree on the handling/focusing, where I can find no fault with the VS1 135/2.3, compared to the other two lenses above (except that it focuses "backward", as do all of the VS1 lenses - <g>). The focusing (in my sample, anyway) is just as "buttery smooth" as in the Pentaxes. Fred
