[Leica] Theoretical mp limit?

[pdzwig at summaventures.com (Peter Dzwig)]

As far as I can see the absolute limit (if that has any meaning) is 
constrained
by the number of sensors that you can fit on a chip of a given size. That is
limited by the "scale size" of the individual sensors that we can provide on 
a
chip and by the architecture of the individual sensors themselves.

In terms of commercial processors we are currently working at "scale sizes" 
at
the tens of nanometer level and smaller scales are available in labs in very
limited quantities. These are well below current scale sizes used in photo 
sensors.

Sensor size and sensor architecture (ie the design of the each individual
pixel-sensors themselves)limits the number of sensors that we can fit in a 
given
area. There is also the question of varying types of sensor; for example 
Bayer
vs Foveon X3 vs others and new designs.

With respect to larger chip sizes with larger chip sizes for a given sensor
architecture goes lower manufacturing yield and substantially increased cost,
although resolution increases theoretically.

In short we are nowhere near any theoretical limit that might be achieved.

However for normal camera usage the issue is as the list has pointed out one 
of
reduced returns. We can only resolve a certain amount and beyond that the 
effort
is wasted. This is less of an issue for other kinds of camera.

Peter

On 23/10/2013 06:30, Frank Filippone wrote:
> I think a response from Bob Adler and his experience with Digital-MF would
> be a good place for further understanding.....
> 
> It is not so much about the number of pixels, but rather the inter-spacing
> distance of those pixels that counts.....
> 
> Noise being the number 1 problem.....
> 
> BTW, I hope everyone understands that most existent lenses are going to be
> limited... the Sensor being better than the lens....and don't even try to
> think through the issues with the mechanical RF....
> 
> You need to be able to look through the lens for focusing, and have micro
> adjustability of your lenses' focus, and best of all, have a EVF to make
> things go right.....to even approach the limits of these 24-36MP
> cameras..... or lenses designed for them.....
> 
> I won't mention the tripod, delayed shutter release, no wind, no land
> movement from passing trucks, nor object movement.....otherwise you just do
> not get the improved quality that these sensors are capable of.....
> 
> The best rationale for a 24-36MP camera is for the ability to crop with
> higher pixel count as your daily 7-18MP user of today......
> 
> Frank Filippone
> Red735i at verizon.net
> 
> 
> 
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> 

-- 

===========================================================
Dr Peter Dzwig