BuyDig discounts a selection of Tamron lenses for digital SLR cameras via this $50 mail-in rebate, as listed below. With free shipping on each, they're at the lowest total prices we could find by at least $20. (Some are at more substantial price lows.) Rebate ends December 31. The deals, after the above rebate:

• Tamron SP70-300mm f/4-5.6 Di USD Lens for Canon (pictured) or Nikon for $339
• Tamron SP70-300mm f/4-5.6 Di USD Lens for Sony & Minolta for $344.95
• Tamron 10-24mm f/3.5-4.5 Di II LD SP AF Lens for Canon, Nikon, Sony & Minolta, or Pentax for $409
• Tamron SP AF 17-50mm f/2.8 XR Di II VC LD Lens for Canon for $519
• Tamron SP AF 17-50mm f/2.8 XR Di II VC LD Lens for Nikon for $524.95