7Artisans 12mm f/2.8 lens Characteristics:

1. Manual Focus Prime Fixed Lens

2. Focal Length 12mm, Maximum Aperture F2.8.

3. All-metal body, including lens hood and bayonet mount.

4. A designed Micro Single lens, could not use on SLR cameras.

5. Portable small and compact, almost the same size as 50mmF1.8.

6. Can be transferred by using the CPL ND filters

7. Widely compatible for Sony E Mount, Canon EOS-M mount, Fuji FX mount, and Panasonic Olympus M43 mount.

8. Very good lens distortion control, could not feel any barrel distortion on naked eyes (of course, there is no absolute zero distortion lens in the world, can only see the very slight one).

* But Sony A7 A9 series can be installed while using crop mode

* Also in the full frame at nearest focus distance, the field can be covered and will have a significant hidden corners; at long-distance focus, the corner will be soft.