This report is coming from the UK and is based on the availability of Sigma and Tamron DSLR lenses at major UK retailers (previous reports of discontinued lenses can be found here): List of discontinued Sigma DSLR lenses: Sigma 15mm f/2.8 EX DG Sigma 17-50mm f/2.8 EX DC OS HSM Sigma 17-70mm f/2.8-4 DC Macro … Continue reading Sigma has discontinued 18 DSLR lenses, Tamron has discontinued 22 DSLR lenses