For a true cinema feel, we recommend a picture size of 100 inches or more. But to keep the image sharp, it isn't just the screen diagonal that counts when you set up a projector. The distance to the screen matters too, so make sure you factor your room size into your plans.

In larger rooms, a standard projector can produce a 100-inch picture from 2.5 to 4 metres away, while in small to medium-sized rooms the distance is usually 1.5 to 2.5 metres. Ultra-short-throw projectors, such as our Laser TV range, can project a picture of up to 120 inches from just a few centimetres away from the screen.

Where's the best place for your 4K projector? Is a ceiling mount the better option, or can it sit on a table? Think about how you want to use it, then decide whether a ceiling mount or a tabletop setup suits you best.

Positioning matters too. If the projector can't sit centrally in front of the screen and has to be off to one side, look for a model with keystone correction or lens shift.

Will you use your projector in a bright, sunlit room, or only in the dark? Choose your UHD projector accordingly. Brightness, measured in ANSI lumens, is the key figure for getting brilliant pictures with the best colour and contrast on screen. If you usually darken the room, choose a model of around 2,000 ANSI lumens to enjoy deep blacks and rich contrast. If there's plenty of ambient light and you want to use your projector during the day, we recommend a 4K projector with 3,000 ANSI lumens or more.

Of course, you won't choose your ideal home cinema projector on room conditions and lighting alone. You'll want one that's built for exactly the way you'll use it. So make sure your projector has the features that matter to you, whether it's for a dedicated cinema room or everyday viewing. BenQ 4K projectors offer different picture modes, for example, so one model can serve a variety of purposes with optimal settings for each.