A storm on the horizon

Above us a wondeful sky, but at the horizon a distant storm gave out a lot of thunders! The red trail at the top right edge of the image is the Orion nebula.
 

Technical Data
Optics Photographical objective
Focal Lenght 50 mm
Focal Ratio f/8
Exposure Time 15 min exposure
Film Kodak PJ-400
Developement sensibility 400 ISO
Location Pian dell'Armà (PV, in the Italian Appennines) at 1400m
Date and time of exposure start 4 november 2000, 22.25 UT
Mount Fixed tripod
Tracking -
Notes -

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