Overview

The Panagor 21mm f/4 (also sold as Vivitar 20mm f/3.8) is an affordable ultra-wide-angle lens manufactured by Kino Precision (Kiron), often found for $20–150. It offers sharp enough images for landscapes and establishing shots, with minimal barrel distortion and soft corners that improve when stopped down or used on APS-C. Build quality is good, with an 82mm filter thread and M42 mount. Close focus to 16cm enables creative macro-like shots. Perspective distortion is typical for ultra-wides. It suits budget-conscious photographers wanting a wide-angle lens for landscapes or creative close-ups.