SmoothView is a free image viewer that barely consumes system resources, is easy to use and has an intuitive interface. SmoothView has the advantage that thanks to it you can stretch the images gently (smoothly; hence the name). It supports most of the known image formats.
Another of its features is that it comes equipped with a powerful zoom with which you can zoom the image from 10% to 400%, all without sharpness between intervals. If you want an image viewer that suits your needs, try SmoothView. It will give you a good result.
You can free download SmoothView 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.