After reading Nikon's description of the NIKKOR 17-55mm f/2.8 lens, i concluded that a crop factor would not apply to this lens. Designed, as stated, exclusively for Nikon's DX format, one of the features Nikon added to the lens was the capability to project a smaller image circle, which, I reasoned, would be of a size appropriate to the smaller image sensors of DX bodies and the image then would not be cropped--or otherwise why do it? --Hang on, I'm almost there-- Therefore a crop factor/multiplier of 1.5 to determine the effective zoom range when the lens is mounted on a DX body is not necessary, e.g., on a DX body, the NIKKOR 17-55mm f/2.8, designed with the DX sensor as its target hardware, does, in fact, have a zoom range, as stated on its barrel, of 17-55mm.
Then, as I read some of the comments at the Reviews tab, I saw people referring to the zoom range of this lens on a DX body as 25.5-82.5mm. And I was looking at that old crop factor again.
Are some reviewers experiencing crop factor confusion or are those reviewers right to apply a 1.5 crop factor to the zoom range? Or, am I correct in thinking that no crop factor is necessary for the NIKKOR 17-55mm f/2.8 lens--that what you see on the barrel of this lens is what you get?