Just received this lens the other day - here are some test shots.
Thanks for this excellent review - I couldn't help thinking "how would these look if I defished them to a rectilinear view" - so here are some of the original images, downloaded and
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corrected using DXO-Pro 11 (which you can often get as a free download). I saved this as JPEGs at 95%. Not bad hey? Certainly good enough for on-screen viewing or small size prints. I am very impressed (thank you) and you may have generated another sale for 7-artisans with this!
Interestingly - I had to move the DXO correction slider to a different setting with each shot to straighten the curved vertical object at the lateral edges in each image. So there is no "one-size-fits-all" correction setting to be used - unless you did some croppting etc before uploading.
Now these corrections are done with web-page compresed originals. Can anyone tell us how they work out using originals? I have had surprisingly good results using the "no-name" 8mm f3.8 generic c-mount Chinese fisheye on a Panasonic micro 4/3 - but these are small fiddly lenses and hard to set and focus - and a true micro 4/3 lens at this price could be the step-up I am looking for.
In contrast to this 7-Artisans "crop fisheye", in my hands with DXO-Pro the Meike 6mm f2 circular fisheye has terrible smearing and CA in each corner when corrected. Remember however that as a true 180-degree fisheye it needs 2-3 times as much distortion correction to approximate to a "rectilinear" view - however in my opinion, it doesn't work sufficient for defishing and will have to stay as a choice for die-hard circular fisheye fans or astrophotographers.
Best wishes to you all - Paul C in the UK