so, until now i've always assumed the colors on my monitor are correct because every time i look "monitor calibration" up through google, i get sites with some grayscale card telling me that if i can distinguish all the squares, my monitor is fine. i could always see the squares so i figured it was fine. but then i noticed that my photos always seem a lot lighter on other screens i view them on. those other screens would be laptops and flatscreens at work, never a desktop. for comparison: on my screen this photo has a subtle transition of colors from black to green, on other monitors it's more abrupt and with layers. a more concrete difference: with me the top right corner (the bricks before the window) are 95 to 100% black, on other monitors they are not. comparison #2: this photo has a 95% black sky with me in the left top corner, on other computers there is an obvious green hint. so, do i need to calibrate my monitor? and what software or hardware would you recommend? any other info on this would be appreciated.