Originally Posted by
Kayaker72
Again, all of those statements are true. The reason why I even brought this up is the exchange you had with Kari about aurora photography. Low light/nightscape images are a scenario where read noise becomes more of an issue, thus there would be a negative impact for Kari's type of photography of more megapixels. For blacks, where signal to noise ratios are low, lower megapixel cameras still show a benefit over higher MP cameras. Now part of that discussion was motion blur, but even that could be effected as if you dial in your ISO to have acceptable noise in the blacks, a higher ISO would allow for faster shutter speed and less motion blur.
To sum up, I find it misleading to state that there are not trade offs going to higher MPs.