image blur around edges

[photodude]

I've been shooting with a Rodenstock 100mm and have had no issues with broad scenes but when I attempt interiors specifically I get the blur around the images edges. Please help, thanks.

[Andrew O'Neill]

Around all four edges?? Can you show us a scan?

[photodude]

No scan readily available. I'm guessing this is diffraction (I'm just starting out). But seems to only be a problem in the tight quarters of interior rooms, where the scene is closer to the lens, if that makes sense.

[Andrew O'Neill]

It's not diffraction if the blur is along the edges. Sorry, I still don't understand. Is the blur on all four edges? Or is the blur on one edge? Are you using an extreme wide angle lens?

[walter23]

If it's not around all corners, but just one or two, you're probably using too much movement for your lens and getting out of the sharp part of your image circle.