I was calibrating some gas monitors to send out to a job site and I though, hey that looks kinda neat.
The upright bottle in the background contains the gasses that we use to calibrate the monitors for field use. Our main concern is Methane and H2S. H2S is a nasty one.
Canon 50D, Tamron AF18-270mm f/3.5-6.3 DiII VC, ISO 400, f/5.6 for 1/50 sec.
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