Hi guys, I'm putting together a home golf simulator guide. Have just written the projector guide. Would appreciate any comments or criticism?
Projectors
Key projector features (in order of importance):
1. Brightness/power. Brightness is measured in lumens. Essentially, the higher the lumens the better. Image brightness will also depend on the reflective properties of screen, the required projection image size, projector distance from screen and the ambient light level. Ambient light depends on extraneous light sources, and methods to shield that light from the screen e.g. blackout drapes, black walls. Minimum projector lumens is about 1500, which is Ok for dark rooms that have good surrounding screen blackout. Preferable is > 3000 and ideal > 6000.
2. Lens throw ratio = projector distance from screen / screen width. Golf simulators are best with a short throw (0.3-1) – this enables the projector to display a large image but still be directly above or in front of the golfer. Being above or in front and not behind the golfer avoids shadows on the screen created by the golfer. For example, if the distance from screen = 2 metres and screen width = 3 metres. Optimal throw ratio = 0.67:1. Longer throw ratio
projectors can work back from the golfer if they are sufficiently elevated to avoid shadows. Ultra-short throw projectors are designed for office presentations and generally don’t have the required lumens and resolution required for simulation.
3. Aspect ratio = projection width / height. Projectors have a “native” aspect ratio which is the aspect ratio in which image resolution is maximal. Projector aspect ratio is usually 4:3 or 16:9 (or 16:10). The projected aspect ratio can be switched vice versa, but as a result, resolution is lost because pixels are removed to achieve the desired ratio. Therefore, it is always preferable to use a projector with a native aspect ratio as close as possible to the desired screen dimensions. Because room height is usually constant at about 9 feet, the required throw ratio is usually dependent on the required screen width: if width < 12 feet, 4:3 ratio is best. If width > 14 feet, 16:9/16:10 is best. Most high-quality projectors are native 16:9 or 16:10, so for maximum resolution, a screen size of 16:9 or 16:10 is best
4. Resolution (number of pixels): higher the better.
4:3 (=1.33): 1024x768 (XGA)
16:10 (=1.6): 1280x800 (XGA),
16:9 (=1.77): 1280x720, 1920x1080 (HD)
4096x2160 (UltraHD/”4K”).
Simulation software is generally 1080p or higher and most support 4K resolution. Note: resolution achieved will be dependent on the “weakest link” of the system – either the simulation software, PC or projector, so if either the software or PC are only capable of a maximum resolution less than the projector, that is the resolution that will be projected.
5. Contrast (=difference between brightest and darkest parts of the image). Higher the better. Gives depth to video images. Measured as contrast ratio or the standardised “ANSI” contrast. Depends on ambient lighting which makes blacks appear more grey.
6. Zoom lens – to enable fine tuning of image size once projector is mounted e.g. 1.2x, 2.0x. It is preferably to not use the zoom function as zoom reduces light output. All recent projectors have this feature.
7. Lens shift – with joystick. To fine tune the image position up/down and left/right.