After acquiring my UWA lens for a week, I still haven't got a chance to really test it in the field. Its a shame to buy a lens and keep it inside my dry cabinet and not using it, so I decided to take some sample shots of the lens
1) Lens Flare Test
The lens shows some weird flares when a light source is positioned somewhat beside the lens, approximately 11 o'clock direction, out of the frame.
I will be pissing off if each image of mine contains flare. Luckily, this is not the case. My second image shows no flare (see below). Anyway, this lens produces beautiful star effect from the streetlight when aperture is narrowed down.