For everyday
photography, it is unlikely that you will be able to tell the
difference between a 2MP and a 3MP camera unless you go to prints
larger than 8 x 10.
I disagree. At 8 x 10, one can easily see the flaws in the camera,
and more pixels will make the 8 x 10 image better.
Furthemore, sometimes it's necessary to crop a photo, so it's
always better to have more pixels.
And noise is a problem with digital, but the more pixels you have,
the less noticeable the noise is because each speckle of noise is
smaller.
And I disagree with you. I also disagree with what you wrote in an earlier post: "go for more MP, and less zoom".
1) About number of pixels:
Just do the math! Let us take the UZi (2MP, 10X) and a "12 in a dozen" camera (of 3MP, 3X) as examples...
-At 4X zoom, the Uzi still has 2MP, the other cam needs 1.333X digital
zoom to get to 4X. By doing so, it retains 3.000.000/(1.333x1.333) =
1.764.700 pixels
-At 6x zoom, the UZi still has 2MP, the other camera needs 2X dgital
zoom to get to 6X. By doing so, it only retains 3.000.000/(2x2) =
750.000 (!) pixels.
-At 8x zoom, the UZi still has 2MP, the other cam needs 2.666X digital
zoom to get to 8X. By doing so, it retains 3.000.000/(2.666x2.666) =
421.800 (!) pixels.
-At 10X zoom, the Uzi stll has 2MP, the other cam needs 3.333X digital
zoom to get to 10X. By doing so, it retains 3.000.000/(3.333x3.333) =
270.000 (!) pixels.
In the above example, you see that the 1.000.000 extra pixels on the 2nd camera aren't even sufficient to get from 3X to 4X. A lot of people underestimate the pixel loss of digital zoom.
Only with pictures less than 3X zoom, the 2nd camera will have more pixels in the final image than the UZi. And yes, an 8x10 enlargement will show more detail with 3MP. However, it is also true that you need to get close to the picture to see the difference. A lot of people have done these tests. See this link for example:
http://www.dpreview.com/forums/read.asp?forum=1008&message=2193392
Also, UZi owners use an easy workaround to get more MP: if you think "this shot would make a great 8x10 enlargement" (how many shots will you have like that anyway?), then just use the panorama function. Stitching 2 photos together will already result in a picture that has more MP than the 3MP camera.
If you want more, you could even take 4 pics "top-left, top-right, bottom-left, bottom-right" and stitch them together. First 2 by 2, the rotate, then stitch these 2 again. I've not done this myself but have seen seen people do it and the result was 100% OK.
2) About cropping:
I hardly ever do it. And if I need it, I hardly need to cut away 2% of an image. One thing IS true; the less MP you have, the more carefull you are when framing a shot. But that actually improves your technique.
3) You also said in a previous post: "more zoom = inferior lens":
??? That is about the biggest BS I've come across on this site since I discovered it! Lenses like the one on the UZi are far more superior than any small 3MP consumer camera out there. And here's why:
- It's bigger, and bigger lenses capture more light.
- It costs more. In this case, it's a Canon lens developped for a prosumer
camera. The same lens is also used by their canon Pro90 IS.
- Smaller optics = more chance of getting "lens flaws" like CA, barrel-
and picushion distortion. Even prosumers with small lenses have these
problems (see Phil's conclusion on the small lens of the Nikon Coolpix
995 for example).
- It is stabilized. Try looking for a stabilized 380mm-reach lens for an SLR
camera. Now try again looking for one that costs less than the UZi.
These types of lenses are normally for professional use, and cost loads of
money!
Conclusion for Ken: The UZi didn't sell because salesman pushed consumers to higher MP's. Now, Oly has stopped producing them, and the last ones are in the stores at a much reduced price. A quality lens that produces 2MP pics which can hardly be told apart from normal 3MP pics, a remote control, 10X STABILIZED zoom, AF light, tons of features, excellent macro capabilities, etc... All that at 500$. It's a steal. Go for it. You won't be sorry.
Ciao,
J.