Indeed, it looks like refraction, a penumbra (shadow) from the neg. carrier. There also appears to be a fainter one at the top of the bottom pic. Yes, quite ghostly.
BTW, I once had edge shadows appear on one edge a mural print (30X40), using a homemade easel. It was a longer than normal exposure and it turned out that the 3/4 inch width melamine easel frame was casting a shadow from one direction – from my safelight! I was able to reduce the safelight's intensity and print without further difficulty.
Last edited by ROL; 03-24-2012 at 08:41 PM. Click to view previous post history.