this post might be a little antiquated in the world of technology, but i wanted to post it for those who are still shooting jpeg (i know, i know, you have your reasons)
let me first say that i am not one of those photographers who says "just shoot it however, we can fix it in photoshop!" i want to be very clear, as professional photographers we should be nailing most of our shots "in-camera" nuff said.
however, as wedding photographers we are dealing with people's priceless memories and i am all for anything that can help us do that better...like shooting RAW.
so i wanted to show the dramatic difference between RAW and JPEG. at one of my recent weddings "CHERESA AND MICHAEL"
we had this great image of Michael getting ready. well it wasn't a great shot at first, but i could tell it had potential. here is the original image. it had dramatic lighting (though you can't tell at first) and excellent composition, but...exposure was a little off, okay a lot off, like 4 stops off.

so i took this original image and exported it from LIGHTROOM as a jpeg. i then took it into photoshop and tried to bring it back to life. here is what happened. well, i can see the cool composition and the dramatic lighting, but but the image is so jacked it wouldn't be useable...right?!

so than i went back to LIGHTROOM to work a little magic and here is the final result.

this is an image that i can still be proud of (though, i didn't actually make this image), i can still put it in an album and wow, i can still proudly post it on my blog.
NOTE: with an image that has been underexposed by 3-4 stops like this, you probably won't be able to save the color information, which was the case here, hence the black and white.
hope this helps someone.