I think you're going a bit far in the other direction saying it's complete crap. It's certainly not good until stopped down.
but even stopped down the quality is not worth the money.
it´s usable stopped down.
and i really don´t want to see the borders when the center region is so bad already.
captured crops were taken from a section of the frame about 1/3 of the distance from the center to the full frame corner – still within what should be the sweet spot of the image circle
The Canon option delivers very noticeably better image quality – it as sharp at f/3.5 as the Samyang is at any aperture in this comparison.
and don´t get me started about the bokeh or distortions.
And unfortunately, this lens has more than an average amount of distortion (barrel) for a prime lens. Distortion can be corrected during post processing, but it is a pixel-level-destructive/image quality-degrading process.
If you are correcting for lens distortion, you can also correct perspective distortion at the same time. This all devalues having the shift feature in the first place.
i mean come on.. this is a prime lens, no IS, no AF, no electronics.... you could think they get the optics right for 900 euro. does not have to be outstanding but at least decent.
ok ok.. i payed 2000 euro for my canon TS lens.
not cheap sure.. but i think when you need a TS lens then you better buy a good one.
i sure would not be happy with the samyang.. not even for 700 euro.