Characterized by its especially thin pancake profile, the Color-Skopar 21mm f/4 P from Voigtlander is an ultra-wide prime designed for M-mount rangefinder cameras. Its slim stature makes it ideal for everyday walk-around use, and the expansive field of view is well-suited to architectural and interior subjects. The manual focus design permits working with subjects as close as 1.6' away, and a removable lens hood is included to shield the front lens element to minimize flare and ghosting.