Re: [Leica] digital M

["Mxsmanic" <mxsmanic@hotmail.com>]

I think it's the sensor that needs the redesign, not the lens.  Lens should be
designed to simply provide the most perfect image possible, without any special
tweaks to accommodate the defects of a specific image-capture technology.

- ----- Original Message -----
From: "Austin Franklin" <darkroom@ix.netcom.com>
To: <leica-users@mejac.palo-alto.ca.us>
Sent: Saturday, July 21, 2001 21:22
Subject: RE: [Leica] digital M


> > > The only thing that worries me is that Leica may have to re-design their
> > > optics (at least wide M lenses) to make the best of the 24*36 mm (>6 MP)
> > > CCDs. Those new lenses should be bigger and heavier, because CCDs prefer
> > > perpendicular light rays. Some CCD experts can clarify this issue.
>
> > Not sure i believe in "digital glass." I think you just make the
> > best lens possible.
> > I think most of that stuff just has to do with a specific coverage.
>
> I do believe this can be a real issue with wide lenses.  The CCD sensor
> elements are going to be recessed (tough ever so slightly) and "bounded"
> between sensor elements and given that the light rays from wide angle lenses
> are more off axis than longer lenses...the amount of light getting to the
> off-axis sensors could decrease as the distance from center increases.
>
> It don't know at what angle this would have an effect (the sensor specs
> should give some information on this I would expect), or if this can be
> corrected by a re-design of the optics...but if sensors are designed with
> this possible issue in mind (or it ends up being a non-issue...but is
> certainly something a designer should at least think about), I think we
> should all be fine ;-)
>
> I'll take a look at some of the sensor specs I have and see what they give
> for off-axis sensitivity or what ever they may call it.
>