I am very confused on how to calculate and implement the short throw distance for an Ultra Short Throw Projector (UST). I'm interested in the Wemax A300 4k Projector. On the website it stated that I need a distance of 24cm to get an 100" immage (throw ratio 0.233:1).
Now when I use this website, and I pick another projector that has the same 0.233 ratio, it stated that the distance is 51cm. But the true ratio is the same.
My question is as follows: Do they calculate the distance from the back of the beamer (closest to the wall), or do they calculate it from the laser (far end of the wall)? I am confused now
The thing is that I have to make a custom made Tv cabinet, do I not want to have the measurements wrong. I hope someone can clarify this for me, because it is giving me a headache