From LT:
http://www.lenstip.com/index.php?test=obiektywu&test_ob=498
LT didn't come to the same 'it's not much better than the Mk I' conclusion that many others have:
"In my humble opinion releasing such a lens was an excellent Canon move. They provided a slightly weaker image quality in the frame centre compared to the predecessor and the Sigma A 24–105 mm f/4 DG OS HSM but the difference is often so insignificant that it would be hard to notice it in real life photos. However, we got a lot in return – and I really mean a lot. Firstly, a better image quality on the edges of the frame, lower chromatic and spherical aberration, lower distortion and vignetting plus a very good performance against bright light. As a result you can enjoy a universal lens with a sensible aperture fastness, equipped with a fast, accurate autofocus and an efficient image stabilization unit – a device practically without any serious flaws."
- A
http://www.lenstip.com/index.php?test=obiektywu&test_ob=498
LT didn't come to the same 'it's not much better than the Mk I' conclusion that many others have:
"In my humble opinion releasing such a lens was an excellent Canon move. They provided a slightly weaker image quality in the frame centre compared to the predecessor and the Sigma A 24–105 mm f/4 DG OS HSM but the difference is often so insignificant that it would be hard to notice it in real life photos. However, we got a lot in return – and I really mean a lot. Firstly, a better image quality on the edges of the frame, lower chromatic and spherical aberration, lower distortion and vignetting plus a very good performance against bright light. As a result you can enjoy a universal lens with a sensible aperture fastness, equipped with a fast, accurate autofocus and an efficient image stabilization unit – a device practically without any serious flaws."
- A