In vain I searched on the website of Samsung for a detailed description of this optical viewfinder. Too bad, because then I would have saved me the order. Spoiled by my Canon G12, which has a built-in viewfinder, which adjusts itself when zooming, I have expected similar of this viewfinder. But the study of 1 (one) page thick "User's Guide" I was disabused. There it is written: 1. The viever can not be controlled from the camera and 2. It is possible that the actual image does not coincide with what is seen in the viewer motif. That was it. We see 80 percent of the 24mm wide angle. Zooms are happening there at all. I wonder what the situation one should actually use these seekers. I thought that in bright sunlight, when the subject is difficult to see on the screen, you could use it. Far from it in which direction the camera is looking, I see even without this congenial viewfinder. So he went back again today