Roosevelt Dime, 1968-D

Not a stupid question at all You have a coin in a late die state. Simply put, the dies used to strike this coin were old and tired with the fields of the die becoming eroded over time from striking many coins. This die erosion transfers to every coin struck and imparts a worn out look even though the coin is uncirculated or close to it based on luster.

Not sure I would consider this an error coin. More like a weak strike/poor die and a poor specimen

I've bought a spotlight-lamp from IKEA, that I aim towards the coin from close range. Hehe. And I just use a normal Olympus X-930 digitalcamera, with 12mpx and the "Super macro" setting.

Have any tips for better pictures?

Ah, yes, I have yet to try with dark background actually. I'll try to find something appropriate. At the moment I just take 2 blank A4 papers as white background.

Do you know of any better setting at a digitalcamera? I know that you can make the photos brighter, but imo that makes the coin look much brighter than it really is. Which would be very wrong if I'm going to sell the coins.

Yeah I've done so on a few of my coins when it has been way too much reflection from the plastic cover of the cases. However I usually only take the pictures and save them sorted on the computer, and link them to each seperate coin I've listed in Excel. Therefore I'm not spending an awful a lot of time experimenting ways to photograph. However, I will think of it before uploading a picture for others to see, thanks for input!