Gear Spotlight : Canon 500D Close-Up lens

We recently met two photographers, Lukas and Suzy VanDyke, that introduced us to the Canon 500D Close-Up Lens(<--This link is the top-seller we bought from). It's a "close-up lens" that can be screwed onto the front of almost any lens with the right thread size. Since we adapt all our lenses to 77mm, this could be a very useful piece of gear for us. Chris and I decided to purchase one, and it just arrived in the mail today! I was anxious to see how much difference it actually made and if there was any loss in sharpness. So, I shot this quick test of my breakfast with the filter on and off.
Both photos were taken with my Canon 5Dmk2 at 1/60 f5.6 500ISO in natural light. The lens is a Nikkor AI 50 f1.4 adapted to EF mount with a KAWA adapter.
The first photo is with the filter on at the minimal focus distance (about 10").

The second photo is without the filter on at the minimal focus distance (about 16″)

Both of the focus distances were measured from the base of the lens. As you can see, it is about the same as the Canon crop ratio. The difference is, you are still getting that full sensor high resolution image with the crop of the cropped sensor. For a really close shot, we could throw that setup on our 60Ds. We are very excited for this addition to our kit! Chris and I have some video shots already in mind that we would like to test out, so keep an eye out for more close-ups.