I have both the Zeiss Victory 8X32s (awesome) and the 8X20s (very packable). As crocker mentioned, the 8X20s have a very small eyebox (I guess that is the term) sweet spot for an unobstructed image. If you are standing still, it is not an issue. If you are in a vehicle or otherwise moving, it can be quite annoying. Not an issue with the 8X32s, but those are obviously larger and cost more. In both cases, the image quality is superb.