Venus Optics is known for making some of the most unique lenses on the market today. Their 10mm f/4 Cookie lens takes the classic pancake design and turns it into a very wide focal length, making it an intriguing option for any photographer looking for a portable (and affordable) walkaround option for things like hikes and travel photography. This great video review takes a look at the lens and the sort of performance and image quality you can expect from it in usage.