01-15-2015, 07:39 PM
Quote:It seems to have some focus shift due to badly corrected spherical aberration. All other aberrations seem to be quite well controlled. After their new 50mm and now this I am beginning to think that samyang is designing their lenses with a workflow very dissimilar to other manufactures and strong weighting to off-axis (corner) performance.Where do you see the focus shift? I'm not sure I can. At least for my specific use it wouldn't be a problem even if there is some, although for an AF lens it would be most undesirable.
As for the design, were you following them when they were designing the 14mm? A preview model was tested by a Polish site and on the basis of that performance, they went back to the drawing board to give us the 14mm they sell now... high resolution across the frame...
Quote:They underweight distortions as well I'd say....and distortion was the thing that stood out most about their current 14mm! I don't recall any significant distortions with other lenses they made since though?
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.