Digital camera always capture very effective, very high pixel photos. To see the real photos in details by zooming in, a high-end digital photo viewer is very crucial.
Browsing online to find these viewers, with some luck, I found four:
1. Windows Photo Viewer
Windows Photo Viewer is embedded in Windows, just set it as default picture open tool, you will be able to open any picture with it. Zooming in, or browsing pictures as a slider is no problem.
2.WildBit Viewer for Windows
3. HD Photo Viewer for Windows Phone (for mobile phones Windows)