[obican]

Most of the time I'm fine with a 24mm and 50mm with me. I also add a 70-210/4 to that when I'm traveling and I use it a lot. I even packed my 200/2.8 with me this time because we had rented a car so it was not really any extra weight anyway. Another time I had packed a 135/2.8 in addition to the 24/50/70-210 line up. I also had a 20/50/85/70-210 setup with me once but I liked the 24mm better. 

 

However, I also wouldn't mind something that goes even longer. 400-600mm lenses would definitely get used if I had one of those.  I wouldn't mind a 16-35 neither, I like wide angle zooms. In fact, I'd even consider buying one before buying a better 24mm lens for my current system. Would I use the 16-35 and 400-600ish zoom all the time? Absolutely not. They'd still be nice to own and use occasionally though. My 200/2.8 goes out about 4 times a year but every single time it ends up contributing some nice images to my portfolio, so it's definitely a keeper. Same goes for the Canon 11-24 we have at the workplace. It's not an everyday lens but it has its places and nothing else can touch what that lens can achieve. 

 

On the other hand, my Hasselblad 500C/M has a single lens, 80/2.8 C T* and I'm absolutely happy with that.