After Canon USA permanently dropped the price for 24 Canon EF L lenses, a new mail-in rebates and instant rebates now live through May 3 to May 30, 2015. You can save up to $200 by mail-in rebates on selected EF L lenses. And Save up to $70 by instant rebates on selected EF lenses.
See all Mail-in Rebates & Instant Rebates on Canon Lens at B&H Photo Video, Amazon, Adorama