Belsha,
Apo correction is often mistaken for resolving power, but really it is correction for colors. Therefore, it is no surprise for me to see you get sharp image from your non apo lens.
Pham Minh Son wrote:
For example, I own the Leica Apo-Summicron-R 2.0/180 and use it mainly wide open. Why? because it was intended to shoot wide open and I paid the price for it but it is my style of shooting portrait most of the time. Also these lens are very advantageous in low light condition.
-Son
I agree. I also prefer the R 180/2.0 over any of the 80/85's but it isn't really the subject of this thread.