Excerpt: I'm using this lens since 2003...& really it had & still a workhorse...about 98% of the time I'm uding this lens either on my D700, D200 or D90...the reason is very logical as 50mm projects a veiw that's equal to the Human eye...yes DX in format it's 75mm due crop fractor..
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Nice Bokeh, Strong Construction
Excerpt: I have never been a fan of 50 mm lens on 35 mm format cameras and therefore always steered towards other focal lengths in a prime lens. But I wanted medium focal length prime lens for digital and and something that was fast, and not too expensive. for a variety of shoot environments.
Pros: Fast, Light weight, Small, Very Useable Focal Length
Excerpt: For people who are deciding between the 1.8D and this 1.4D, I say get this one if budget is not an issue. Besides the extra fraction of a stop, which can make a difference in bokeh softness (not really much in low-light shooting ability, since 1.8 is real), you will also get a more consistent manual...
Pros: Fast / accurate auto-focus, Lightweight, Nice Bokeh, Strong Construction
Excerpt: Light, Compact, Fast apature, reasonably priced, And very sharp. Focus is very fast on a d800. Awesome 14 point sunstars that you can't get from rounded aperture blades (or any canon lens). The people at DXO think this lens is better than the g version (if that means anything to you).