Strange thing, and very rare (therefore expensive). Like for it's brother 8mm the multi-coating has not the same color towards sky then towards ground.I made two photos (on a tripod) with it and it's direct competitor the Zenitar 2.8 / 16mm, frame and distorsion are identical, the Peleng does not completely cover the sensor of the Canon EOS 5D in the corners. As the Zenitar is more compact and more modern look, it explains why this lens is less common.
The set I received:Leatherette brown bag, and four filters: neutral, UV, orange, green.