What matters most in a projector for floor use

Most projector specs are written for front-of-room presentation use: brightness for conference rooms, throw ratio for screen distances, keystoning for wall projections. Floor projection for dance has different requirements, and specs that matter for wall use don't always translate directly.

The three specs that actually matter for dance studio floor projection:

Brightness (lumens): You're projecting onto a light-colored floor under studio lighting. The projector is competing with ambient light reflected off the floor surface. Most studios need 3,000–4,000 lumens minimum. If you run stage lighting on during rehearsal, budget for 5,000+.

Throw ratio: This determines how wide a coverage area you get at a given mounting height. For overhead floor projection, you want short-throw (0.4–0.8) so you can mount at ceiling height and still cover a large floor area.

Keystone correction range: When a projector isn't mounted perfectly perpendicular to the floor, the image is a trapezoid rather than a rectangle. Wide keystone correction range (±45° vertical or more) lets you mount at less-than-perfect angles and correct in software.

Mounting options: overhead vs. front-of-stage

There are two practical mounting positions for dance floor projection:

Ceiling mount (overhead): Best option. Mount the projector directly above the stage area with the lens pointing straight down or slightly forward. This gives the most even floor coverage and the least keystone distortion. If your studio has a drop ceiling, a standard projector ceiling mount works — you'll install it inverted so the lens faces down.

Front-of-stage high angle: If you can't mount overhead (concrete ceiling, rental space, etc.), a projector on a tall stand or wall bracket at the front of the stage angled steeply downward works. You'll get more keystone distortion and a trapezoidal coverage area, but calibration software (including Coryo) handles the correction so positions still land accurately.

Avoid side angles if possible — they create heavy distortion across the width of the stage that's harder to calibrate out cleanly.

Short-throw vs. ultra-short-throw for dance

Short-throw (0.4–0.8 ratio): The sweet spot for most dance studios. At a 12-foot ceiling, a 0.6 throw ratio projector covers approximately a 20-foot wide area on the floor. Enough for most studio stages with a single projector. These projectors are widely available in the 3,000–5,000 lumen range from major brands at reasonable prices.

**Ultra-short-throw (< 0.4 ratio):** Designed for wall-mounted setups very close to a screen. They work for floor projection but require careful mounting — at ceiling heights, even small angular errors create large distortions. The wider lens also means the image quality at the edges drops more than with a standard short-throw.

Standard-throw (1.5–2.0 ratio): Workable if you have high ceilings (18+ feet) or are mounting at the front of the stage at a steep angle. Requires more ceiling height than most studios have available for overhead mounting.

Calibration: getting positions to land accurately

Buying the right projector and mounting it correctly gets you halfway. The other half is calibration — making sure the software knows exactly how the projector's output maps to the physical stage.

Without calibration, a projected position marker for "center stage" might land two feet to the left because of slight mounting imprecision or lens distortion. Calibration corrects for all of these by computing the transformation between the projector's image coordinates and actual stage coordinates.

Coryo's calibration process: place physical reference markers at the four corners of your stage, open the calibration interface, and drag the four on-screen points until each projected dot lands exactly on its physical marker. Coryo computes the homography and saves it as a venue profile. This calibration survives power cycles and software restarts — you only redo it if you physically move the projector. See how Coryo's projection system works →

Recommended projectors for dance studio floor projection

Budget pick (under $700): Epson EX9240 or BenQ TH671ST. Short-throw, 3,200–3,500 lumens, solid keystone correction. Good for smaller studios with controlled lighting.

Mid-range ($700–$1,500): Epson PowerLite 1288 or BenQ MH733. 4,000+ lumens, better color accuracy, wider keystone range. The right choice for most professional studios.

High-brightness ($1,500+): Optoma ZU506T or similar laser projectors. 5,000+ lumens, long lamp life (no bulb replacement), stable color output. Worth the investment for stages with active lighting or for installations that need to run daily without maintenance.

Any of these work with Coryo. The hardware choice is entirely about your space and budget — Coryo's calibration handles the accuracy regardless of which projector you use.

Running the full system in rehearsal

Once the projector is mounted and calibrated:

1. Connect the projector to a laptop running Coryo. 2. Open the Projection tab and load your calibration profile. 3. Select the formation sequence you want to rehearse. 4. Use Coryo's playback controls or the mobile remote to advance through formations.

The mobile remote (ProjectionRemote) is particularly useful here — it lets you walk the floor with dancers and advance formations from your phone without breaking the rehearsal flow to go back to a laptop.

For studios that rehearse the same piece across multiple sessions: once calibrated, the setup is simply "connect the laptop, load the profile, go." Total time from walk-in to projection on is under two minutes.