( f/1.8 @ 1/50 ISO800 Manual Focus)

(i'll post something in colour when i get back promise)
Bokeh (derived from Japanese, a noun boke 暈け, meaning "blur" or "haze") is a photographic term referring to the æsthetic quality of point-of-light sources in an out-of-focus area of an image produced by a camera lens using a shallow depth of field
A few days ago i went to the Bellagio Garden in Las Vegas for some photographic therapy. Each time I go i try to give the photos a different feel. This day i wanted to shoot everything in f/1.4 giving me a nice shallow depth of field.
Shooting this shallow is a nice way to isolate objects in the photo due to the immense blur of the background. I noticed while i was there that several other people where trying to get a similar effect. While it is possible with a good selection on lenses its easier to achieve this effect with Prime, Macro, and Telephoto lenses. and the reason being
Prime Lenses: They have no zoom and only change range of focus and many come with extreme low apertures (f/1.2 f/1.4/ f/1.8 etc)
Macro Lenses: these lenses are many to focus on a very small range even at apertures as high as f11
Telephoto Lenses: With range like 70-300 anything not in the direct range of focus with be blurred similar to how the eye works.
While you can do this on a lens with a smaller soon range such as 12-24 or 17-55 it is possible if you have a lower aperture or you're at full zoom and about 2-8 inches from the object.