[Klaus]

As tiny as it gets for a full-format ultra-wide lens.

https://www.opticallimits.com/sonyalphaf...myang18f28

[obican]

Been keeping an eye on this lens, so the review is very welcome. I think it's a great alternative for a cheap and small ultrawide prime and the image quality seems to be pretty OK if you stop it down. Might be even fine wide open on lower resolution models.

[Rover]

Surprisingly good given the size and price (and the surprising distortion correction compared to - say - the new Tamron primes which are reported to be breaking negative records in this regard despite being of narrower angle and physically larger. Good to have an f/4 lens with an emergency f/2.8 capability, too.

Oh, and looking at the block diagram, it's funny that this lens only has one regular glass element, the other 8 are all either aspherical or made of special glass. Maybe that's how the manufacturer was able to cram so much performance into such a tiny package.

[ominouscore]

I think Samyang AF has excellent quality for the price range.