Re: Digital ISO; lens optimization)

[Terry <terry@xxxxxxxxxxxxxxxxxxxx>]

I just read an article on this the other day, and that is correct, what you 
just said, however as I understand it the problem only presents its self 
when you use very wide angle lens' also as for manufacturers designing the 
digital sensor, each pixel has a lenses in front of it to direct the light 
to the bottom or back of the light well, certain manf. I believe Canon is 
one of them have designed these "lens'" on the sensor so they focus the 
light at the bottom of the well using their production film lens' if that 
makes any sense.
Terry M
----- Original Message ----- 
From: "SteveS" <sgshiya@xxxxxxxxxxxx>
To: "List for Photo/Imaging Educators - Professionals - Students" 
<photoforum@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Sunday, January 30, 2005 12:18 AM
Subject: Re: Digital ISO; lens optimization)


> The digital 'film plane' or exposure chip is flat, the normal film lens 
> sends a cone shaped beam of light to the back, or film plane.  Digital 
> lenses are ground so the 'beam of light' is sort of like a rolling pin, or 
> straight back at perpendicular angles to the capture-chip. (or whatever 
> it's called)
>
> I spent a few hours talking to a lens designer at the gallery where I once 
> worked.  Yeah.  They're different.
>
> Or, the camera manufacturers have shaped the light capture surface to 
> compensate for their film lenses.
>
> S.
> ----- Original Message ----- 
> From: "Greg Fraser" <fraserg@xxxxxxxxxx>
> To: "List for Photo/Imaging Educators - Professionals - Students" 
> <photoforum@xxxxxxxxxxxxxxxxxxxxxx>
> Sent: Saturday, January 29, 2005 11:22 AM
> Subject: RE: Digital ISO (actually now lens flare and optimization)
>
>
> > ----- Original Message -----
> > From: "Eclipse Agency"
> >
> > : What about lens flare and such? The article gave a few reasons how
> > digital
> > : lenses are optimized.
> >
> > When I first heard of so called 'Digital' lenses I said 'yeah right'. But
> > the thing that caught my mind as being a possibility was not so much 
> > flare
> > from outside light sources per se but rather the light reflecting off the
> > sensor and back towards the lens and then reflecting back into the sensor
> > etc. Supposedly the digital lenses have more anti-reflective coating to
> > prevent that. I'm no expert like Vlad, but that sounded plausible to me.
> >
> > Greg
> >
> >
> >
> > --
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