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The only lens I have tried so far that shows little or no aberrations with full frame is the Canon 300mm F2.8L. That is why they cost $5k+. The 85mm F1.8 is considered to be a very good lens but that fails at the corners to axial and paraxial aberrations (seagulls). The lack of chromatic aberration makes up for it.
The 50mm F 1.8 although a good lens does even worse.
But the consolation is I can now go ahead and try to make very large mosaics
using the 300mm lens for medium detailed images and the 85mm lens to provide images as a template so no distortion creeps in. Just imagine this same image at the image detail of the 300mm lens.
I am extremely impressed with the performance of the 5DH. This image was captured with a lot of light pollution present. I am now itching to try some much darker skies.
Bert
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