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Forum: Optics Theory - 06-05-2019
Replies: 57
Views: 3,197
Posted By Calzone
ASPH to me means a highly corrected lens with...

ASPH to me means a highly corrected lens with enhanced sharpness.

Sometimes though the spillover can be harshness, unsmooth OOF, and ugly bokeh.

Cal
Forum: Optics Theory - 06-05-2019
Replies: 57
Views: 3,197
Posted By Calzone
Ray, The first ASPH lenses required hand...

Ray,

The first ASPH lenses required hand grinding and were not so easy to make.

They offered a complexity.

I would say they are more complex and not as simple a lens to make.

Some early examples...
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