Challenge has finished
A publisher needs an image suitable for the cover of a high school chemistry book. The client imagines beakers and test-tubes but is equally interested in images of elements and compounds. The most important consideration is that the book not be confused with physics, biology or geology.
Show full rules
Wednesday, 4th September, 2013 (GMT)
Wednesday, 11th September, 2013 – Tuesday, 17th September, 2013 (GMT)
Wednesday, 18th September, 2013 – Tuesday, 24th September, 2013 (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
|Umbrellas by pleytime|
from An A to Z of Subjects- Week 21, U
|Glass ball on a perforated metal plate _2 by harubux|
Most popular cameras
Beginner's GuidesGetting StartedPick a winnerCamera Roundups UpdatedIn-depth testingLatest Camera ReviewsBeyond the studio testsFeature Articles and Videosreal world performanceField Test Videossee how we seeSample Galleries1147action-packedSony a6500 First Impressions711new kid on the blockYI M1 reviewWhat's that Noise?Shedding some light on the sources of noise191VideoDog Portraits with the Sony a6300shop aroundHoliday Gifts for Every Budget89instant gratification2016 Instax mini roundup1361ultimate om-dOlympus E-M1 Mark II Review97i wanna fly awayBest Camera Drones Under $1500273wide-angle wonderSigma 12-24mm F4 Art Lens Review2407FeatureWhat is equivalence?