Uneven tonality in an apparently even scene?

[John Koehrer]

Well, since we're throwing out SWAGs here. Here's mine.

Camera has a vertical travel shutter---vignetting would appear at T &B of frame. Not sides.-----most unlikely.

Lens vignetting---maybe, w/parralel edges---not likely.

Enlarger---vignetting w/parralel edges---not likely.

Processing, edge density, agitation. IMO most likely.

 

[dancqu]

I have attached an example, though it's hard to see
exactly what I'm talking about.Thanks. Jmal

The distribution of grays in the sky seem to be reflected on
the ground. Notice the light areas and how in the sky and on
ground they define symmetric dark areas. Perhaps some very
unique quality of light and reflectance of subject. All your
landscapes turn out the same? Dan

 

[gainer]

Possibly flare from the side lighting. Were you using a lens shade?

 

[JBrunner]

Could be sun spots.

 

[Bob Carnie]

Another thread, just posted today by Andrew with more severe but similar problem.
Grey Cards, Grey Cards, Grey Cards. process, process , process.
the agitation and water content adjustments will solve unevendevelopment but it takes patience and persistance to eliminate the problems.

 

[Gary Holliday]

It also seems that if there were a light leak on the edges, they would be darker, not lighter. http://www.flickr.com/photos/71163977@N00/511310878/
Thanks for the help.

Edit: the suggestion to shoot some slides seems good. I'll do that after I finish my current roll.

Jmal

I was referring to a light leak on the negatives, which would appear light on the final print.