Do any of you have advice to offer, based on personal experience, on how best to use a Leica 90mm f/2? I have recently acquired a second-series Leica 90mm f/2 Summicron. This is the one with the built-in lens hood that looks a bit like a collapsible drinking cup -- the one prior to the pre-ASPH Summicron-M. I have already examined prior threads in this forum regarding Leica's various 90mm lenses, so I have at least a general sense of how this model stacks up against later versions of the same lens, and other Leica 90mm lenses. I'm not asking for that sort of comparison with other versions, or with other lenses. I'm also not looking for comments on its size and weight, which I was aware of before I bought it. Rather, I am interested in practical advice from those who are currently using this lens, or have used it in the past. What sorts of of subjects, circumstances, or photographic approaches would you consider this lens to handle most favorably? How do you get your best results with it? What techniques would you employ to use it to best advantage? What, in your view, are its greatest optical strengths and weaknesses? What sorts of subjects, circumstances or techniques would you consider this lens to be less well suited for? If it has any particular weaknesses, are you aware of any techniques which might be used to avoid or minimize them when shooting with this lens?