I've gone through my "fast lens" phase. You know what I mean - having to get the 35mm f/1.4 when the 35mm f/2 was so much smaller and lighter to carry. Getting the 50mm f/1.4 when the f/1.8 is so much smaller and lighter to carry. Getting the 85mm f/1.4 when ... I didn't go that far yet!<p>At one point I had the 50mm f/1.4, f/1.8AI and f/1.8 Series E lens. I got rid of the Series E as being too redundant, but now I miss the slim little guy. It was great on the FG - a very light weight kit. Now I find that I have these wonderful fast lenses, but carrying them around is less fun then before due to their bulk and weight. The other aspect about the 50mm lenses that I currently have is that I hate their bokeh. You see sharp 7-sided polygons whenever you shoot at anything less than wide open. It's really beginning to annoy me - especially when you compare it to the creamy bokeh of the 105 f/2.5. All of this is pointing me to the ultimate in petite - the 45mm f/2.8 AI-P. Most importantly, the 45mm f/2.8 P has great bokeh (as per reviews, I've not had one in my hands).<p>OK, make fun that it only has 4 elements and is based on a Tessar design. Who cares as long as the images are sharp? By all reports this is a sharp lens. It also has a trace of pincushion distortion as opposed to the barrel distortion that my 35mm and 50mm lenses currently have. I'd prefer neutral to a miniscule touch of pincushion over barrel if I can get it. I took a full length picture of a female co-worker with the 35mm f/1.4 and she was NOT pleased with the outcome. The barrel distorion of the 35mm f/1.4 visually added 10-15 lbs to her weight.<p>The downside is the f/2.8 aperture, which I can live with. I've not used f/1.4 or f/1.8 in a long time. The other BIG downside is the BIG price for this tiny lens.<p>Before I get deep into this, I'd like to obtain information from current and former 45mm f/2.8P owners. Once you got the lens, did you have any use for the 50mm lenses anymore? How about the 35mm lens? My thought at this point is that if I get the 45mm, I could just get rid of the 50mm lenses, and possibly even the 35mm. I don't need to do this for the money. I just think that too many lenses in the same general focal length just doesn't serve a useful purpose. I'd love to hear what you did, 45mm f/2.8 P owners!