Trying to reacquire a link: Comparing the 'strength' of lenses blur

I wasn't sure what to title this thread.
2 weeks ago I came across a great link to a website where you choose choose a lens FL, aperture and it would graphically chart the 'strength' of the bokeh. Updating my browers I lost it, and many other bookmarks.
It was not comparing specific lenses, but you could chart multiple lenses on the graph.

50mm 1.2 / 100 2.8 / 200mm 4.0 / etc


If you have see this website could you link me to it.
I know this is 1,000,000 to 1 chance but I have re searched many thread here and cannot re find it.

When you say " it would graphically chart the 'strength' of the bokeh", and then say "It was not comparing specific lenses", I would suspect you are not looking for an evaluation of "bokeh", which is how out of focus areas may appear and the different qualities of things such as bits of highlights, but maybe more likely a breakdown of "depth of field", which gives a view of how much of an image would be either within an "acceptable" focus or else be visibly out of focus, for a variety of focal lengths, apertures, and distance between the camera and the target "subject"...

If what I'm saying is correct, then there are places where you can check those things:

http://www.dofmaster.c​om/dofjs.html

http://www.cambridgein​colour.com/tutorials/d​of-calculator.htm

http://howmuchblur.com ….8-on-a-0.9m-wide-subject

^ Ahhh winner. Thank you. Wilt That was the sight I had saved before.

To Tonylong I have the dofmaster re bookmarked and I have never seen the cambridge in color website before. Thank you for sharing them as well.

thx 4 the links

here is another
http://camerasim.com/a​pps/camera-simulator/