jerry_cipriano3

<p>Mark, the 24-70mm/4L IS has a $200 rebate thru Oct 29. That lowers it's price to $799, although you would pay tax on $999. It is close to the same price as your 24-105mm, which you could sell on the used market for perhaps $600 +/-. That would make your cost approx. $200 plus tax on the purchase price.</p> <p>Also, Canon sells refurbished copies of the lens at $788 from the Canon website:<br> (http://shop.usa.canon.com/shop/en/catalog/black-friday-lens-and-speedlite-flash-deals-in-july)</p> <p>I believe that other smaller and lighter mid-range zooms would be older and lower IQ lenses. You would find those to be inferior to the 24-105mm that you currently own and a poor match for your 6D. I actually own one of those older and smaller lenses, and it doesn't do justice to my 5D II (28-70mm/f3.5-?). I'm considering the 24-70mm/f4 IS. I'm not familiar with Sigma, Tamron, or Tokina alternatives.</p>

<p><em>"If the new Canon 16-35mm/f4 beats the corner and distortion performance of my current 17-40, then I will be standing in line to purchase this one."</em><br> <br />The question is: WHY? If one already has the 17-40mm, which is a very good lens, why replace it with a roughly equivalent lens? Stepping up to the more expensive 16-35mm will certainly put more money into Canon's pockets, but it won't make one a better photographer. It's important to look at the big picture and not get lost in the marketing details.</p>