Mike, interesting observation on CA as I've just had cataract surgery on
second eye this morning. Do you have a good reference on the resultant
visual effects of this surgery?
...Wayne
> -----Original Message-----
> From: olympus <olympus-
> bounces+wayne.harridge=structuregraphs.com@xxxxxxxxxxxxxxxxx> On
> Behalf Of usher99--- via olympus
> Sent: Monday, 5 February 2024 9:42 AM
> To: OM list <olympus@xxxxxxxxxxxxxxxxx>
> Cc: usher99@xxxxxxx
> Subject: Re: [OM] How does it look?
>
> WS writes:<<Using the filter for softening softens uniformly. Whereas
> spherical aberration <<varies with focal point, as bokeh does.
> Yes, I think you are spot on in that observation. Alt.Moose has that very
cool
> Minolta Varisoft lens that has controllable spherical aberration.Curiously
the
> cornea has net positive spherical aberration, (peripheral photons focus in
> front of main focal point) but the post-processing engine (occipital lobe)
> takes care of it. Curiously if one adds more pos SA say in an IOL
(Intraocular
> lens for cataracts) there is no discernible loss of visual acuity (to a
point) and
> the depth of field is extended. As there is no free lunch in optics the
cost is
> loss of contrast sensitivity especially at higher spatial frequencies
especially
> apparent when photons are scarce.Not too fuzzy, Mike
>
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