« on: January 31, 2013, 10:18:20 PM »
I am considering getting a 24-70 f4 to replace my 5 year old 24-105 to use on a 5D3. has any one got one and are you pleased with it.
The 24-70mm f/4.0 IS is a hyped up lens and for most purposes peice of junk if you don't need the macro. Many review sites confirm that it has boarderline image quality in the middle of the zoom range. Both the-digital-picture.com and lensrentals confirm that it is very poor in the middle of the zoom range, and that's after testing just under 30 copies. Lens rentals downplays it's performance in the middle of the zoom range, but it's actually worse at 50mm than the 24-105mm is at 24mm, and most people complain about that lens at 24mm. In fact it has the lowest single average score with multiple copies tested and averaged at 50mm than any other pro normal zoom. It's so bad that no matter how much you stop it down at 50mm, it will never be as sharp as the 24-105mm is at 50mm wide open, because it hits the diffraction limit before the IQ becomes anything less than extremely poor.
This lens is so incredibly bad at 50mm, that the old entry level non-pro 28-135mm IS that has very poor reviews is actually much much better at 50mm f/4.5 than this lens is at 50mm f/4.5. Which is a serious acheivement for a pro lens.
I purchased a copy and did an extensive comparison with over 600 shots of a test target and after doing both visual comparison and computer analysis from 24-70mm the 24-70mm f/4 had EQUAL image quality to the 24-105mm, if not slightly worse on average. It was much better at 24mm, much much worse at 50mm and around equal at 70mm. To say the least it went straight back, I don't need a lens that has worse image quality, costs nearly twice as much and has only 2/3rds the zoom range.
I know of at least 3 people that have purchased this lens on hype and returned it. Besides that it's a terrible investment as Canon is sure to drop the price over 30% in the next 6 months as they have done with every new release in the last year. While the 24-105mm has a virtually fixed price.
This lens WILL be better for you if you want macro, need a slightly smaller and lighter lens (very slight) or shoot at 24mm and 70mm more than 40mm,50mm, & 60mm, but again it's twice as much and slated for a huge price drop.