5000 Lumens 0.495:1 Throw Ratio Native 1080P Educational Projector Short Throw Laser DLP Projector for Classrooms

A projector that does not need the middle of the ceiling. At a 0.495 : 1 throw ratio, the BPH50ST stands close to the wall and still fills the screen — which means no long cable run, no ceiling drop in the centre of the room, and no shaft of projector light in the presenter's eyes. 5,200 lumens to ISO/IEC 21118:2020, a native 1080p DLP engine, and a 4.5 kg body that one technician can lift onto a bracket.

The light source is an MCL laser diode module rated 20,000 hours in standard mode and 30,000 hours in Eco. There is no lamp to replace, no lamp to keep in stock, and no ladder in the maintenance calendar. As with every laser projector, output declines gradually with accumulated hours rather than dropping away at the end of a rated life — the specification says so plainly, and Eco mode is there when you want to stretch the interval.

The throw ratio is 0.495 : 1 — a single figure, because the lens is fixed and the zoom is N/A. Throw ratio is a ratio, not a distance: at 0.495 : 1 the projector sits roughly half an image-width away from the surface. As a worked example, a 100-inch 16 : 9 image measures about 2.21 m wide, which puts the lens at about 1.10 m (calculated from the ratio; not a factory measurement table). Screen size runs 40" to 300" on the diagonal, with a 1.16 lens offset and manual focus.

The specification carries two brightness figures and we publish both. 5,000 lumens is the ISO/IEC 21118:2020 rating — the average across production units. 5,200 lumens is the centre-of-screen reading, which is how a light meter tends to be pointed. Image uniformity is 85 %, so the corners hold up against the middle instead of falling away. Contrast is 6,000,000 : 1 dynamic, full on / full off — a dynamic figure, stated as such, because that is what the measurement is.

Native resolution is 1920 * 1080, with 1.07 billion colours and a 16 : 9 frame that also accepts 4 : 3 and 16 : 10 content. Two HDMI 2.0 inputs take signals up to 3840 * 2160 at 60 Hz with HDCP 1.4 / 2.2 support, so a 4K laptop or media player connects without a scaler in between. The panel is 1080p; the inputs are 4K-capable. Both statements are true at once and we keep them separate.

Vertical and horizontal keystone each travel ±30°, and four-corner correction then pulls each corner independently — useful when a short-throw unit sits off-axis because the furniture or the window left no other place for it. The chassis installs at 360°, horizontally or vertically, in front, rear, ceiling-front or ceiling-rear orientation, and a security lock slot is provided.

Two HDMI 2.0 inputs for the laptop, the streaming stick, and the presenter who brought a second one. A VGA D-sub 15 input for the room PC nobody has replaced. Audio in and out on 3.5 mm jacks, a 16 W speaker for rooms without a sound system, and a USB-A port rated 5 V / 1.5 A that powers a stick or a dongle. RS232, RJ45 and Mini USB (DFU) handle control and firmware, so the unit fits an existing AV rack rather than sitting beside it.

Connect AC and the projector starts; a signal on the input starts it too. Auto signal search and auto PC adjustment take the picture the rest of the way, with auto vertical keystone as the unit settles. When the source disappears, ECO mode engages, a five-minute sleep follows by default, and a timer can shut the unit down at the end of the day. Six display presets are available — Standard (cool / warm), Eye-care, Vivid, DICOM, sRGB and User — alongside HSV colour management, twelve background colour presets, five menu positions, keypad lock, power-on password, built-in test patterns and Active 3D support.

DICOM here is a display preset, not a medical certification or a diagnostic claim.

210 W consumption, below 0.5 W in standby, and ≤ 35 dB in standard mode / < 32 dB in Eco. The body measures 337 * 295 * 113 mm and weighs 4.5 kg net, 5.5 kg gross. Operating range is 0–40 °C at 20–80 % relative humidity, non-condensing, up to 3,000 m altitude, with a dedicated high-altitude mode above 1,700 m. In that mode the ambient ceiling becomes 0–35 °C; above 35 °C the light source is throttled and fan noise rises. Both limits come from the manufacturer's own notes and are worth knowing before a summer installation.

• Classrooms where the teacher stands between the projector and the screen — the light path stays below eye level instead of crossing the room.
• Meeting and huddle rooms too small for a long-throw mount.
• Training rooms where the furniture layout changes and the unit has to sit off-axis.
• Retail windows and showrooms where the projector must be invisible from the aisle.
• Museum and gallery label walls that need 360° mounting and corner correction.

Large venue main stages, outdoor use, auditoriums with strong uncontrolled daylight, and colour-grading suites that work from 4K panels. 5,000 lumens and a 1080p panel are honest numbers, and they have a ceiling.

• Remote control * 1
• AAA batteries * 2
• Power cord * 1
• Quick start guide
• Certificate of conformity
• Warranty card
• Electronic user manual