Oxidation (Capture date and size rule) Please read all...
Challenge has finished
We can't live without it, but oxygen is also a destroyer of many things. Show us a photo that captures this process. It can be a Apple turning brown of an old rusty pickup.
Show full rules
Tuesday, 24th April, 2012 (GMT)
Tuesday, 1st May, 2012 – Monday, 7th May, 2012 (GMT)
Tuesday, 8th May, 2012 – Monday, 14th May, 2012 (GMT)
Capture date rules:
Maximum number of entries per user:
Maximum number of entries in challenge:
p previous n next c challenge f full size r retract vote # vote
Most popular cameras
in time for the holidaysCamera Roundups Updatedshop aroundHoliday Gift Guides for Every Budget69i wanna fly awayBest Camera Drones Under $1500In-depth testingLatest Camera ReviewsBeyond the studio testsFeature Articles and Videosreal world performanceField Test Videossee how we seeSample Galleries1246ultimate om-dOlympus E-M1 Mark II ReviewWhat's that Noise?Shedding some light on the sources of noise710new kid on the blockYI M1 review172VideoDog Portraits with the Sony a6300557action-packedSony a6500 First Impressions70instant gratification2016 Instax mini roundup204wide-angle wonderSigma 12-24mm F4 Art Lens Review2325FeatureWhat is equivalence?