I will preface my reaction to this comment by saying I have no expertise or specific knowledge however ... I do like/buy fast lenses because they are faster (I like to shoot in low light), but I have also thought they were usually better than a slower counterpart (and that has factored into my decision making at times). My thinking was along these lines: The manufacturer usually charges substantially more for a faster lens ... and I expect since it commands a premium price that better build quality, research and design come along with it (maybe I'm naive) Since the manufacturer considers a lens "acceptable" wide open, I've assumed that a faster lens stopped down to the same aperture as its slower counterpart wide open would deliver better IQ (than the slower one). Am I all wet ? I've not heard that a smaller front element => less correction, but have heard that "big glass is good for IQ" ... is this just an old wives tale ? It seems to me that most lenses that I've seen described as having a certain magic are relatively fast lenses for their FL ... but maybe I'm wrong. Pardon if I have strayed too much from the original topic, and like response I quoted I am making these observations in general but think that they might apply to the two Fuji 35's.