So I bought this lens for my recently adquired Canon A1. I wanted a zoom to complement, and I went for a Cosina 80-200 f4.5 -I just couldn't afford any other thing, as since I won't be using it very much, it sure can satisfy for a while. Someday I'll upgrade. I received it yesterday, and found something strange, which I want to ask you about. The thing is that, after shoting, the aperture remains at f5.6 (the lens is f4.5). Obviously, this affects the visibility through the viewfinder. Then, trying to find out about this, I noticed that the aperture seems to open again completely when I wind. Well, I just wanted to ask you if you have some idea about what could be happening here. It doesn't seem to be a big problem (is it a problem at all?), but still... Next time I'll try to save and buy better lenses. They are the most important part of all, aren't they? By the way, and making two threads in one (sorry!), what do you think in general about zoom lenses? I know many people don't like them at all, and although I always thought that was exagerated, I begin to suspect it may be not. I have not been really satisfied for a long time with the results of my Nikon AF 35-70mm f3.3/4.5 (well, I blame the lens... maybe I'm wrong?), and that long time I have been thinking on getting rid of that lens and start with a 50mm. I like that crisp and clear images and I just don't get them... Any opinions on this?