It’s Sigma time at Adorama! Coupon code LENSFRIDAY gets you additional discounts on select Sigma lenses. The price after coupon is shown there. You also receive 4% promotional rewards (to be used in future purchases), along with a free Sigma USB Lens Dock, and for orders placed today and Thursday, you also get Free Overnight Shipping. The lenses are (after the coupon discount):

+ 18-250 f3.5-6.3 DC macro HSM for $299 (OS for C/N, not for A/K)
+ 18-300mm F3.5-6.3 DC Macro OS HSM for $450 (C/N)
+ 18-35mm F/1.8 DC HSM for $699 (C/N/A/P/Si)
+ 35mm f/1.4 DG HSM ART for $799 (C/N/Si)
+ 50mm f/1.4 DG HSM ART for $849 (C/N/A/Si)
+ 8mm f/3.5 EX DG Circular Fisheye Lens for $859 (C/N/Si)
+ 150-600mm F5-6.3 DG OS HSM “Contemporary” for $899 (C/N/Si)
+ 50-100mm f/1.8 DC HSM Art for $999 (C/N/Si)
+ 70-200mm f/2.8 EX DG OS HSM for $1049 (C/N/Si)
+ 50mm f1.4 DG Art HSM with Mount Converters (EF or Sigma) to Sony E for $1049
+ 50mm-500mm f4.5-6.3 APO DG OS HSM for $1479 (C)
+ 18-35mm F/1.8 AND 50-100mm f/1.8 DC HSM ART for $1779 (C/N/Si)
+ 150-600mm F5-6.3 DG OS HSM Sport Lens for $1849 (C/N/Si
+ see them all at the Adorama Sigma Lens Sale

Decoding the Codes
+ C = Canon EF
+ N = Nikon F
+ A = Sony Alpha A SLR system
+ K = Pentax K
+ Si = Sigma SA
+ E = Sony E mount
+ X = Fuji X
+ m43 = Micro Four Thirds
+ FT = Four Thirds
+ CX = Nikon’s Angry Inch
+ Q = Pentax Q
+ CM = Canon Mirrorless EF-M
+ M = Leica M
+ U = Universal Unicorn mount

Coupon code LENSFRIDAY gets you additional discounts on 42 lenses at Adorama. You can test the coupon without logging in or creating an account, simply page-down in the shopping cart in the payment section and enter the coupon at the appropriate box.

B&H Photo is also running a promo code promotion on these 13 Sigma Art Lenses – use promo code SHOPBH16GM to get $100 off the current prices. I do not know when the promo code expires.