Being new to 4x5", I've come across an issue with a few of my negatives that I've not experienced with 8x10" negatives. See:
My hunch is the film either wasn't loaded correctly or has moved out of position before exposure. Any comments?
Tom
Note: apologies for the spelling.
Tom, look at the "shadows" left by the film guides on the film you have displayed here.
On the left hand side the film guide goes almost to the top of the Neg (this is what it is supposed to look like)
On the right side, the film guide stops further down the film.
What I think you have done, is get the left side of the film correctly under the guide but you have missed on the right hand side and the film has sat behind the Darkslide support shelf.
I had this happen to me quite a few times when I started 5x4 - I guess its all part of the learning experience
Now, when I load film, I keep my thumb and forefinger on the front edge of the film guides on either side of the holder - so I can feel the film slide under the guides
Most of the time the film slides in without a problem but occasionally it needs repeated attempts.
I used some sacrificial film to improve and verify my technique first in the light and later loaded in the dark followed by a visual inspection.
Hope this is of some help
Martin