Hi,
I don't have an answer for you regarding your camera. I do have a solution if you happen to have access to the Photoshop program.
Scan photo
In the layers palette
copy the background
Click
convert to smart objects. Access this from the layers palette (shortcut is
up arrow, command, N on a Mac)
Go to the
image menu
Select
adjustments
Then select
shadow/highlight
This will balance out the "too dark" shadows in your photos. This tip is also great for pictures that are too dark overall. Good luck!
