Tech monthly readers’ pictures: clusters Tech monthly asked readers to join in GuardianWitness photography project and share their photos of clusters – here are the ones we liked the most Tweet Young spiders in a huddle: Our top pic was captured by clenchpen2 and shows a huddle of young spiders 'spotted in the garden, just before they scattered'. The image was taken on a Canon 60D, 60mm macro lens, f8 1/125, ISO 400. Photograph: clenchpen2/GuardianWitness Coral cluster, submitted by madidus Photograph: madidusmadidusmadidusmadidus/GuardianWitness Broken ice in Cophenhagen harbour contributed by washboard101 Photograph: washboard101washboard101/GuardianWitness Photograph: washboard101/GuardianWitness Shoal of Jacks: 'I dropped into a massive ball of jacks on a dive trip to Sipadan Island, Malaysia. The island was popularised by Jacques Cousteau and is often cited as one of the top 10 dive sites in the world,' says pxguru Photograph: pxguru/GuardianWitness A cluster of sheep: Taken with iPhone 4S with flash on, by Andreas Hatjoullis Photograph: Andreas HatjoullisAndreas Hatjoullis/GuardianWitness Photograph: Andreas Hatjoullis/GuardianWitness City workers captured by blueboy59 Photograph: blueboy59/GuardianWitness Droplet cluster submitted by ahaselden Photograph: ahaselden/GuardianWitness Lots of little houses: the view from Carlsberg Group HQ in Copenhagen over terraced houses in Vesterbro, in this second entry from washboard101 Photograph: washboard101/GuardianWitness Tangled up in rust: contributor hogsvilleBrit noticed this bundle of steel rods at a building site Photograph: hogsvilleBrit/GuardianWitness Then it rained: rorymcdonald gets an aerial view of a crowd in Prague Old Town waiting for the Astrological Clock to chime Photograph: rorymcdonald/GuardianWitness