This 25mm lens from Pergear was a little disappointing but overall worth the money. Image quality is excellent, and the focus ring is smooth and works well, although it feels a little "light" to me, or rotates too easily, which I prefer. The problem is that the lens feels very cheap and the finish isn't very well done. In particular, the imprinting of the brand logo and lens model name on the lens makes it look like someone is assembling them in their garage. Compared to 7artisans, this lens looks a lot cheaper and looks very amateurish. However, the optics are at least as good as the 7artisans and that really counts.