[dave9t5]

Hello


What is an off coplanar projection defect ?

I read in the Zone of photozone that it was a form of centering defect.


What is the symptom and what is the cause of such defect ?

Do all decentered lens suffer from off-coplanar projection ?

There is a test that mention such defect but there is no image sample showing the issue:
http://www.opticallimits.com/Reviews/276...ew?start=1



Best regards

Emmanuel

RTFAQ:

http://www.opticallimits.com/lens-test-faq

 


Q: What is a <i>centering</i> defect ?
<p style="margin-left:40px;">A: A centering defect originates in a misaligned lens element or lens group. The result is a blurry corner, an off-coplanar projection (symmetrical blur) or object edge shadows. A centering defect is normal to some degree - there's simply no perfect lens out there, not even a Leica. Generally centering problems are more obvious with large aperture lenses and they're more frequent with budget (third-party) lenses.