the information isn't there in the first place because it is blocked by the
lower quality lens. that is what i said at the beginning. a lower quality
lens that is just acceptable on the *istD doesn't benefit from a larger
sensor because it is already band limiting the signal to something less than
the Nyquist frequency of the *istD sensor. in addition, there is a low pass
filter in front of the sensor to greatly reduce the chance of aliasing. i
seriously doubt that Pentax is going to omit a band pass filter on a 10MP
sensor. raising the sensor resolution without raising the lens resolution to
match by using better lenses means that larger prints won't be any sharper
on the new sensor. why go to a larger sensor if you aren't going to crop
more or enlarge more?
Herb...
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <pentax-discuss@pdml.net>
Sent: Friday, September 30, 2005 7:24 AM
Subject: Re: Pentax Future? What's next for Pentax...
You are wrong. The problem you get without oversampling is the
information you dont have, and that is the information between the pixels.
The lacking information gives multiple solutions and those produce several
harmonic spatial frequencies. That's why DA converters etc use a lot of
tricks to avoid folding, to reduce the number of unwanted solutions.
Oversampling is a very simple approach, and is what you get if you have
more pixels than necessary.
