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.

Additional information and pictures:

It comes with a soft lens bag.

This is the camera deity Hood is fixed

Front Coating

Shooting

Without any crop Effect

Sure, the standard 12 super wide angle

Abnormal hyperbole perspective

Sharpness is good, in magnification

One more coming

There is a bit covering under long distance

Those two are shooting at close focusing distance

Sharpness has no problem

Although it is manual focus lens

Has Peak focus position, very convenient

It taken by roadside
Not to mention composition

7Artisans lenses have become quite popular with their best bang for the buck approach to lens design and they are bringing their glass to Xmount. They do not make the smallest or lightest lenses, but their optical performance for the price is quite good on Leica and Sony cameras.