Samyang 135mm F2 vs Zeiss 135mm Apo Sonnar F/2 Axial CA : 無料・フリー素材/写真
Samyang 135mm F2 vs Zeiss 135mm Apo Sonnar F/2 Axial CA / John Loo
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | All of these image were taken at a magnification of ~1:20. The ruler was placed 45 degrees to the camera. Both lenses were focussed to the 8 inch mark at 545 nm.The Samyang has the best axial CA correction of any lens I have ever tested. It appears to have been corrected out to at least 405nm while the zeiss is probably only good out to about 435nm. I suspect that both lenses will show significant focus shift at ~700nm, but I lacked a deep red light source to test that theory.Note that the brightness of an image is not a reflection of the transmission at that wavelength. I had to reposition light sources multiple times to switch wavelengths, so two shots at the same wavelength could have significantly difference brightnesses. Also, the Samyang appears to be about 1/3 of a stop slower than advertised. The Samyang has a heavy red cast to it, and it usually needs to have the color balance decreased by 300-400 kelvin. Sunnyvale, CA |
| 撮影日 | 2015-04-24 23:43:03 |
| 撮影者 | John Loo , Sunnyvale, USA |
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