We all know MP don´t mean a thing unless you really need them for your specific purposes (ie: big crops, huge prints, macho comparisons). But still, when I told my mom yesterday that I was keeping a nice 3MP P&S for myself (to carry everywhere the rest of my stuff would be impractical) and that I had a bunch of them to sell really cheap (I´m kind of in the business) in case any relative/friend wanted one, she replied with: But 3MP is so little... That comes from a woman that cannot program a VCR This made me decide and finally do this comparison I have wanted to do for a while (at first I thought of showing it to customers, but I dunno if it´s a good idea ) Ok, so here. I´m posting 6 different pics (5 here + 1 later), taken with: a 2MP camera a 3MP camera a 4MP camera a 5MP camera a 6MP camera and a 35mm camera All the cameras are of the same brand, all of them but 1 are taken by me in the last 3 years (I think). I adjusted the aspect ratios and I set the resolution to about 1200x800 which fills my macbook screen and is too big for the web and probably the biggest your average point and shooter will ever need to show his vacations to his friends or the last thing his baby did. I saved them as JPEGs at quality: 60 My conclusion??? I cannot tell the difference in resolutions, what I can tell though is the difference in sensor sizes and 4-5 years of development in the field. So investing in a larger sensor is much more intelligent than investing on a smaller sensor (I'm talking P&S vs. APS size here, I haven't yet tried neither full sensor or 4/3 cameras)... and between 2 equally sized sensors with a 1MP difference, I may even choose the one with lower MP. Still, I'm very much curious about what do you guys think, can you tell which pic is which? or can you only tell them apart from image quality unrelated to resolution?