I have and use the AI-s version of this lens and I cannot praise it highly enough. Although I have had it for over a year, it is only now that I am really starting to enjoy using it and seeing what it can do. I do have some questions about it though - I would appreciate your input. The built in hood. My slide hood seems not so good - it tends to 'slump' whan extended and does not grip solidly like the hood on my 200mm f/4 Q.C. I am using the seperate hood for the Ai version at the moment. Is there a fix for the slide hood or are they just a poor design? Focus. My lens goes a bit past infinity - I cannot just turn it to the stop for infinity work, but instead I need to just 'back off' and focus on the distant hills. Is this normal for this lens? I add a couple of photos I took last week to demonstrate the lens' resolving power. First photo is the full frame, the second is a crop. The colour and sharpness of this lens is first rate, and the bokeh is smooth too. Yes, one lens CAN do it all! Yout thoughts and experiences welcomed.