Noise may become a problem but you can push exposure 4 stops either way in Lightroom’s ACR. Same with the Photoshop version which has a slightly different interface but the same engine.
Want to see the full power of Photoshop? Start here, then look at the rest of his site. He skips the camera part and goes right to Photoshop!
http://www.bertmonroy.com/fineart/text/fineart_damen.htm
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