M. P. , Oct 20, 2012; 05:05 p.m.
For me the 24-105 F4L was the only L-series lens I have ever NOT liked. I found the distortion bth in vertical and horizontial lines and vignetting at 24mm to be unacceptable for an L-series lens. I much prefer my Canon 17-40 F4L if I need 24mm. If I need 70+ I use one of my 7-200 lenses. However, I have been extremely happy with the Tamron 24-70 F2.8 VC combined with the Tamron 70-300 VC. I love them both in price, build and performance. I especially enjoy having a fast F2.8 and Image stabalized lens for about the same price or a 24-107 F4 L.