We have told Sigma will announced another full frame lens sometime in 2013. This rumored lens is Sigma 24-105mm f/4 DG OS HSM lens(Not sure if has optical image stabilizer).
This lens might be a good replacement for the EF 24-105mm f/4L IS USM and AF-S NIKKOR 24-120mm f/4G ED VR lens.
See also: List of Sigma Lenses to be announced before Photokina 2014.
Affiliate Disclosure: Some of the links in this article are affiliate links. As an Amazon Associate I earn from qualifying purchases. This means if you click on the link and purchase the item, we may receive a small commission at no extra cost to you. This helps support our site and allows us to continue making comprehensive reviews.
Canon 24-105L is actually a very good and sharp lens. Hope Sigma one is significantly cheaper and even better
For Nikon, this goes half way between the lit 24-85 and the semi-pro 24-120, after the great 28-105 D is long gone. It is, no doubt, a great range for FF.