Magcubic HY300 Projector Auto Keystone Correction and Focus

The correction is digital. The projector does not move its lens; it redraws the picture on the panel in a slightly smaller trapezoid that lands on the wall as a rectangle. That is why a heavily corrected picture is a touch smaller and softer than one from a projector sitting square to the wall.

• What it reads: the projector's own tilt, not the shape of the wall.
• What it fixes: vertical keystone, when the lens aims up or down.
• What it leaves alone: a sideways angle, unless the model offers horizontal or four-corner correction.
• What it costs: a little picture size and a little sharpness, more at steep angles.

Magcubic states auto vertical keystone on its HY300 Pro, Pro+ and Ultra, and most other HY300 makers follow suit. For small tilts, such as a projector on a low table aimed at a wall above the TV, it works so quietly that most owners never think about it.

Magcubic's own advice for a square image starts with placement. Put the projector on a flat surface with the lens facing the wall directly, then let the auto correction do the rest. Still leaning? Recalibrate before reaching for manual controls.

1. Set the projector on a level surface, lens square to the wall.
2. Open Settings, Projection Settings, Keystone Correction, Initial Angle Correction and let it relearn level.
3. Still crooked? Turn auto keystone off in the same menu.
4. Use manual keystone (on the 2026 Pro it appears as Manual Down Keystone Correction) to pull the edges straight.

A bumped or dropped projector can come back with its sense of level slightly off, which is what the initial angle step repairs. A picture that tilts as a whole, rather than bending into a trapezoid, means the surface is not level; a folded card under one side fixes that faster than any menu.

For a projector that must live off-centre, a model with four-corner adjustment helps. Salange's HY300 Ultra states 4D/4P digital adjustment, which moves each corner separately.

• Manual focus: Magcubic's HY300 Pro+ uses an internal gear that you turn by hand until text looks crisp. Simple and reliable, but you need to reach the projector.
• Electric focus: the Magcubic HY300 Ultra focuses with buttons on the remote. SKUOU's HY300 Plus does the same with F+ and F- keys, which also helps when a mounted projector sits above head height.
• Auto focus: ClokoWe's HY300 Pro+ refocuses on its own after a move and still allows manual fine-tuning.

Focus on the centre of the picture with something sharp on screen: a menu, a subtitle or a paused title card. An LCD projector with a single small lens is usually a little softer in the corners than in the middle, so aim for the best centre and accept slightly gentler edges.

Focus after keystone, not before. A correction reshapes the picture, and a final touch of focus afterwards gives the cleanest result. An image that will not sharpen at all usually means the wrong distance; Magcubic gives the 2026 Pro a working range of 0.5 to 3 metres.

1. Place the projector at the head of the bed, as close to level as you can.
2. Swivel the head until the lens points straight up, or as near as the stand allows.
3. Let auto keystone settle, then check the corners from where you will lie.
4. If the frame leans, run Initial Angle Correction or correct by hand.
5. Use digital zoom, 80 to 100% on models such as the Alwtniet Pro, to fit a small ceiling without moving anything.
6. Focus last, from the pillow if the model has electric focus.

A ceiling is often closer than a wall, so the picture is smaller: at a 0.9:1 throw ratio, about 1.6 metres gives roughly 80 inches. A higher surface, such as a wall mount or a tripod beside the bed, lengthens the throw and enlarges the frame. Mounts that keep the swivel free are gathered in HY300 stands and mounts.

Manual focus means sitting up to turn the gear. That is the main reason people who watch mostly on the ceiling pay for an Ultra with electric focus.

1. Auto vertical keystone. Saves every evening the projector sits low or high. Standard on nearly all models.
2. Electric or auto focus. Saves the ceiling setup and any mounted projector. Found on the Magcubic Ultra, ClokoWe's Pro+ and a few Plus models.
3. Initial angle correction. Saves the evening after the projector gets knocked.
4. Digital zoom. Saves moving furniture when the picture overshoots the wall.
5. Four-corner or horizontal keystone. Saves off-centre rooms. Rare, so buy for it if your room needs it.

For most rooms, Magcubic's HY300 Pro+ covers the first and third. For bedrooms where the picture lives on the ceiling, the HY300 Ultra adds focus from the remote, and ClokoWe's HY300 Pro+ focuses itself.

Some Ultra descriptions promise six-way auto keystone correction without saying what the six ways are. Judge those models by the vertical keystone and focus lines they share with the rest of the family, not by the count.

The menus behind each step are mapped in the HY300 manual in plain English, and distances for every picture size are in HY300 screen size by distance. A blurry picture that no setting fixes is covered in HY300 fixes.