This article was originally posted on Photofocus.com.
One of the biggest challenges for those who enjoy making landscape and architectural photographs is to locate and acquire the ideal wide-angle lens for the job. While no amount of gear is a replacement for experience and skill, we invariably learn as we go that certain projects will call for a solution beyond our existing means. Fortunately for photo-kind, powerful in-roads for testing and using specialized gear have surfaced to level the playing field, allowing photographers of all stripes full-access to the best tools and equipment available.
Leica 18mm f/3.8 Super-Elmar M

If the idea of shedding pounds from your bag in exchange for a ton of quality resolution is appealing, the Leica 18mm f/3.8 Super-Elmar M aspherical wide-angle prime is in a league of it’s own, especially when attached to the Sony Alpha A7R full-frame mirrorless body.
Here’s a quick look at the overview from the experts at LensRentals.com:
“The Leica 18mm f/3.8 Super-Elmar-M is a relatively compact lens that features one aspherical element, offering high resolving power with wonderful image quality. While the f/3.8 aperture doesn’t allow for extreme low-light shooting, it does provide simple focusing due to its large depth of field. Despite being an 18mm, it has very little optical distortion, making it a great option for architectural and landscape photography. The retrofocus design allows for great corner sharpness at all apertures, as well as a limited amount of color shift. It does have Leica’s 6-bit coding that allows the M9 to correct for vignetting.
Please Note: To best make use of this lens, we suggest the use of an external viewfinder to aid in composing.”