bought this lens almost 10 months ago because of the many positive reviews on the web and in specialist magazines. The lens is used on a Canon 5D. I have to say that I have not regretted the investment until now! It takes very nice sharp pictures. Definitely better than my EF Zoom lens. Although you have to say that with f1.4 you have to be very careful where the focus is. Simply taking a picture is not possible mmn. But from f2 the pictures get better and better & at f8 there is nothing more to complain about. The colors are very lifelike. If you have practiced a bit, which I had to, then this fixed focal length is a lens that brings a lot of fun to photography. You yourself are the zoom and you have to think about how and where you stand in order to get the picture you want. Rethinking is required! With f1.4 everything can be cut out beautifully and especially at sunset (my favorite time of day to photograph) beautiful scenes can be captured with it. At 50mm, this lens is somewhat unusual for landscape photography and is more at home in portrait photography. But I think it's an all-rounder with which you can photograph everything (e.g. in churches without a flash). And it's more "back to basics" than the high-end L series lenses with various stabilizers. You just have to invest a little more in an image to get the desired result. In addition, it is light, small, handy and unobtrusive (an advantage in street photography). I would recommend this lens to anyone looking for a medium prime lens but don't have the money for the L version or the better Sigma f1.4. I can't compare it to the 50mm f1.8 as I've never held this lens in my hands. But, as they always say, "you get what you pay for". So I think the f1.8 can't be better than the f1.4.