Same sensor size but different megapixels on a Point 'n' Shoot produces same quality images?

highest megapixel on camera image

IBM ThinkP

I have an old Canon PowerShot A610 5mp camera that seems to take the nicest pictures out of all my Point 'n' Shoot cameras.

If I upgrade to a later model with the same sensor and the only difference being higher megapixels, would I be able to get both larger and better quality images? Or would images from the higher megapixel camera just be equivalent to a stretched out image from the lower megapixel camera that I have now?

Answer
There is a point of diminishing returns when you start cramming more pixels onto the same size sensor. If 5 is good, 8 may be better, but 10 may be too many. Each pixel of the sensor gets so small that it no longer functions as well as the slightly larger pixels on a lower resolution sensor of the same size.

Canon figured this out when it went to 14mp sensors, and has now backed off that number to 10 and 12 again.

What's the highest megapixels a camera can have? (what amount is the highest in the world) ?

Simon Legr

I've seen 10 megapixel cameras but I'm sure there are ones higher than that. Please tell me what is the highest amount that technology has enabled us to create.

Answer
In a regular camera format, the Canon 1Ds Mark ll has 16.7 megapixels. It costs $7.000 without lenses.
For studio work, the Hasselblad mentioned above has 39 megapixels on a single sensor. It costs $30.000.
They could go larger... it's really just a matter of time, but for now it's cost prohibitive.
Some people have made 1 GIGApixels images (also mentioned above) but this is accomplished by stitching hundreds of smaller pictures together.

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