David Murphy
Veteran
My experience with both the Canon's has been very positive, especially the 28/3.5. The 28/2.8 was really pushing boundaries optically when it first came out, but it is a beautiful compact gem of a lens that does a decent job, especially stopped down a little. The Avenon/Kobalux 28/3.5 is a modern and superior lens optically to the similar Canon, but I have found the build quality to be fairly poor.