How I came to my decision:
The tonic was not really a bad lens, at least, the copy I had lent me for testing. But since there was about a SWW then I wanted to go to the 10mm focal length (however, I did not want a fish eye, because that would have been only playing). Had there been qualitative advantages over the other would be the focal length 2mm me but ultimately not have mattered.
From Tamron I was very surprised, because the specimen, unlike many customer reviews, at 100% view no blur had what could not be said for the Sigma 4-5,6, that was probably a Monday model.
I almost do not even tried the 3,5er, due to the miserable results which gave the 4-5,6er.
But since I had both at the view then I am still struggled through the test of 3,5ers despite I had already decided on the tonic, but because it was a tad better than the Tamron.
Fortunately, because the 3,5er is knackscharf to the brim actually shows no vignetting or chromatic aberrations, but I do not know that it also applies for all these lenses if you like the Kundenrezis reads here, would indeed be the other way around can and I would now become the owner of 4-5,6er or Tonkia.
Conclusion:
Strong buy recommendation, if you caught a good one.
