What We Like
+Fast STM autofocus with smooth, quiet operation in milliseconds
+Exceptional 122.5° ultra-wide field of view with minimal distortion for a 12mm prime
+Bright f/2.8 aperture ideal for low-light and astrophotography
+Sophisticated 15-element optical design effectively controls flare, ghosting, and chromatic aberration
+Compact and lightweight at 499g with professional control features
+Significantly undercuts competitor pricing at $659.99
Worth Knowing
−Heavy vignetting requiring significant post-correction (approximately +74 adjustment)
−Corner sharpness drops noticeably from the center and midframe performance
−Bulbous front element prevents front filter use; rear filter slot required
−Third-party lens without native Sony electronic distortion corrections