Sigma Imaging UK is offering a special £50 cashback program for all new purchases of Sigma’s 18-250mm F3.5-6.3 DC Macro OS HSM lens. The promotion is effective from 1st August 2015 up to 30th Septemberl 2015. Terms & conditions apply to this offer and claims must be received by 31st October 2015 in order to qualify for the cashback.  Complete list of details available on the redemption form.   Click here