|Canon EF 24-70mm f/4L IS USM Lens|
The Canon EF 24-70mm f/4L IS lens is avaiable now and I have used it for a few days and found the lens to be a delight. Overall, the image quality is excellent. The 4 stop IS performed flawlessly, chromatic aberrations and vignetting are well under controlled, on both full and cropped framed bodies but the real pleasant surprise is the beautiful bokeh the lens creates, when used wide open. There is some softness around the outer corners but stepping the lens down by one stop increases the sharpness dramatically. This is common on almost any lens and not a concern to me.
For those who need a wedding or landscape lens and is contemplating or not willing / unable to buy the EF 24-70mm f/2.8L II, this lens is a perfect choice, especially if one has the EOS-1D X body as well. This piece of glass reminds me of the choice between the EF 70-200mm f/4L IS vs. the EF 70-200mm f/2.8L IS II. Both are excellent lenses but I chose the latter, at the time, because I needed the faster aperture. Had the EOS-1D X been available, I would have purchased the f/4 lens instead, and save some money and weight in the process.
Visit my website MichaelDanielHo.com to see photos taken with both lenses.