anh la nuoc ngoai (canada) va da song o Vietnam 8 nam. Anh la nhiep Anh, nha bao, va dao dien. Anh co la sigma 300mm 2.8 APO cua Nikon, va bay gio, muon ban - anh chup voi cai len 2 lan 6 nam thoi. it lam.
cai lens new hon 3300usd - nhin day:

http://www.sigmaphoto.com/300mm-f28-ex-apo-dg-hsm
http://www.bhphotovideo.com/c/search…
http://www.naturephotographers.net/sigma30028.html

anh ko accept less than 2000usd.