Challenge 1: Toby's 4th

The idea of this is too be very abstract; kind of leaf explosion. It is quite out of focus and I was tempted to blur some bits of it further in PS. 

D90, 50mm, f/2.8, ISO200, 1/800s. Gheluvelt Park, Worcester.

Challenge 1 - Tom's third

Very similar idea to Kev's contrast of colours, although I promise it was taken before I'd seen his (my processing is still bogged down with Em and De's wedding pics, so I'm slow at the moment). I like the surprising burst of colour, especially contrasted with the almost monchrome background. Also like the idea of the soon to be dead leaf lying near the skeletal remains of those who have taken the plunge earlier!

16-85@85mm, f/8, 1/125s, ISO 400. Near Hardingstone village, Northamptonshire.

Challenge 1 - Tom's first stab

Similar concept to Kev's - very shallow depth of field, but sadly not quite so interesting a tree! Like Kev, think the DOF is a bit too shallow here, ideally would have liked to get both leaves in focus and with hindsight, probably would have been better to focus on the foremost leaf. However, love the detail the backlighting has shown up on the leaf.

16-85 at 85mm, f5.6, 1/25s, ISO 200. Delapre Park, Northampton.