Misi agan-aganwati... Butuh pencerahan nich.. lagi bingung mo beli lensa antara CANON EFS 17-85mm IS USM atau Tamron 17-50MM F/2.8 XR ll non VC Ane prefer landscape shot, bagusan mana dr segi kualitas, fungsi, and ekonomis. Mohon dibantu. Thanx b4