Green’s Dictionary of Slang

smudge up v.

[smudge n.1 (3)]

to photograph.

[UK]J.J. Connolly Layer Cake 254: The murder squad will be smudging up the proceedings with a telephoto lens.
[UK]J.J. Connolly Viva La Madness 111: Are we being smudged up with a telephoto lens as we speak?