I came up with the following idea: mounting 24/1.4 and 85/1.4 on dual format cameras, let's say on d700 and d300. In terms of field of view and depth of field, this gives effectively 24/1.4, 35/2.2, 85/1.4 and 135/2.2. I would consider this set for portraits on location, weddings, baby shoots and travel. If anyone uses that lens set with dual format cameras, I'd love to hear their opinion because I have some concerns. First, while 135/2.2 is still impressive for portraits and sports, the exotic 24/1.4 becomes a boring 35/2.2 on crop camera. Second, I'm concerned if the added noise will degrade your expensive lens collection. Third, I wonder if you don't get tangled up with the lens changes and their different properties on dual format cameras. At any point in time, you will either have 35/2.2 and 85/1.4 or 24/1.4 and 135/2.2 (in terms of FoV and DoF). Is this feasible in practice?