Corner sharpness: Four Thirds vs 35mm (bandwidth warning)

Started Oct 27, 2007 | Discussions thread
Amin Sabet
OP Amin Sabet Veteran Member • Posts: 6,763
Re: FF corner test using my primes

Ominous wrote:

But why the fascination with corner sharpness?

I have no fascination with corner sharpness. In fact, I don't give a damn about sharpness in the extreme corners. I just got sick of reading discussion over 35mm vs Four Thirds system corner sharpness with no examples, so I posted an example.

As for why some people care so much about corner sharpness, there were a couple threads on this in the Canon SLR Lens forum. Those with that obsession, more prevalent amongst landscapers, start to notice a difference in sharpness based on zones of distance from the center, analogous to what we see in MTFs. People see a critically sharp center surrounded by a zone which is disappointing by comparison, followed by the smearing in the extreme corners. Really expensive lenses start to disappoint, and really really expensive lenses become "necessities." I'm happily oblivious to that particular obsession.

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