What We Like
+Exceptional value at $159 price point with premium all-metal construction
+Bright f/2 aperture rare for ultra-wide primes, excels in low-light and astrophotography
+Minimal distortion control with clean center sharpness and well-controlled vignetting
+Compact and portable at 333-345g with smooth manual focus ring and quality build
Worth Knowing
−Corner and edge softness at wide apertures (f/2-f/4), requiring stopping down to f/8-f/11 for full sharpness
−Lateral chromatic aberration present, especially in corners, though fixable in post-processing
−Cramped aperture ring positioned above mount makes adjustments awkward for some users
−Focus breathing issues and some coma distortion limit suitability for astrophotography at wide aperture