Not only the size of the picture is important, the background and lighting makes big difference as well. I have two sample pictures here for the same gun (sorry, not Parabellums).... same big 1024x768 size, both are sharp, but reveal different level of details.
Which one should I post on an online auction site when I sell it..... maybe both.
http://forum.lugerforum.com/lfupload/type542.jpg
http://forum.lugerforum.com/lfupload...ight_copy1.jpg