Keep in mind, when I post an image, I resize the print down to 1200 pixels on the long side. I do this for two reasons. One is to reduce the size of the file that has to be uploaded to the forum. The other is to discourage unscrupulous folks from stealing one of my images, as a file at this resolution won't print well. Actually, I don't worry too much about that, but it is standard practice among photographers posting on the internet.
As an example, this image is posted at 1200 x 800 pixels. The original image, after editing and cropping, was 7628 x 5085 pixels. The original from the camera was 8256 x 5504. The posted image here has a fraction of the detail the original image has. The resolution of a modern, high end, digital camera is astounding.
