Full frame 35mm is thought to be the most versatile focal length. When I go on a day trip with my family most of the time I use this. So far my old Canon nFD 35mm F2.8 did the job for me. Although being not a recent design it's a very solid performer on the Sony A7. The only thing I really missed was the autofocus capability. When the first rumours emerged that Samyang was going to release a native, 35mm, AF, pancake, full frame lens for Sony E-mount knew I would go for it.