Vintage window grating in Xizhou

Vintage window grating in Xizhou
Vintage window grating on the side of the old telecom office. The wavy look is not one I've noticed before.

Image Metadata

Date Captured

Camera

NIKON D3100

Aperture

ƒ/3.5

Shutter Speed

1/60 sec

Focal Length

18 mm

ISO

450

Exposure

0 EV