We had a chance to test and compare two models: ViewSonic PA503S vs Optoma UHD50 and this review should help people who are looking for a good projector. Based on our rating, PA503S has a total rating of 5.6 out of 10 versus 8.6 for UHD50.
Advantages ViewSonic PA503S over Optoma UHD50
Better brightness: 3600 vs 2400 lumens
Lower power consumption, 260 W vs 348 W
Longer lamp life (normal mode): 5000 vs 4000 hours
Advantages Optoma UHD50 over ViewSonic PA503S
Bring the cinematic 4K UHD experience home with the UHD50
Bigger projection screen size: 34-302 inch vs 30-300 inch