Acer LCD AL712 17"TFT/1280×1024/500:1/20ms/TCO99/speakers

ten muzu mit za 1426,- i s DPH

ale me se vic zamlouva tohle
Acer LCD AL732 17"TFT/1280×1024/450:1/16ms/TCO99/speakers

a ten by me stal 15850,-

co vy na to

a jeste me zajima jakej je rozdil mezi 450:1 a 500:1

co to vubec oznacuje ??