IRIX is one of the lesser-known lens manufacturers, but they produce some rather interesting lenses that promise high levels of image quality, particularly suitable for landscape photography. The 15mm f/2.4 Dragonfly offers a fairly wide maximum aperture paired with an ultra-wide focal length, all at a modest price, and this excellent video review takes a look at the sort of performance and image quality you can expect from it in usage.
[ Read More ](Originally posted by Alex Cooke)