John Loo:
Sigma 70mm Macro @ 405nm
John Loo:
Sigma 70mm Macro @ 465nm
John Loo:
Sigma 70mm Macro @ 522nm
John Loo:
Sigma 70mm Macro @ 624nm
John Loo:
Sigma 70mm Macro Test Setup
John Loo:
Image Plane Longitudinal Chromatic Aberration