I do not know how I could get by the first year with the EOS 550D without the extension. The Extender does not only minimize the nudge the tip of the nose to the LCD screen of the camera, but reduces the image of the viewfinder so that you can see 95%, instead of the previous 75% ... means for eyeglass wearers: One sees finally everything in is looking neckline visible as nciht wearing glasses and even a bit better. Perfect fit processed as usual with Canon, it fits on the 3 Series (EOS 300 to 700D). The eyecup is obenaufgeklippt retracts. Wonderful accessories!
