Projection guide
Standard, short, and ultra-short throw
Compare standard, short, and ultra-short throw with GLMedia based on image width, placement, circulation, and documented optics for your event.
Planning criteria
With the date, location, and intended use, we can review which equipment and combination can be offered. You can inquire before measurements, drawings, or the final schedule are ready.
Throw relates projection distance to image width. Standard, short, and ultra-short categories guide research; confirm the choice using the exact lens and model table.
We can compare positions from a sketch. Show screen, people, and equipment even before final measurements are available.
System decisions
- Space
- Review the optical path and circulation. A shorter lens changes possible placement but does not automatically remove shadows or obstacles.
- Adjustments
- Identify available zoom, focus, offset, and lens shift. Digital correction does not replace optical range or allow every physical position.
- Surface and support
- Check flatness, compatible surface, and exact-system mounting. For ultra-short throw, review geometry at the planned position carefully.
What to share
Share image width, available distance, and screen height. A side photo helps identify obstructions.
If a projector is available, send its model and lens code. We can separate available adjustments from unidentified accessories.
Send a side-view sketch showing the screen edge, possible projector location, and presenter area. Include approximate dimensions of any planned table or structure so we can compare positions.
Preparing the comparison
- Find the official model and lens table or calculator for the correct aspect ratio.
- Check the distance measurement reference point. Do not automatically measure from the chassis edge.
- Check optical range, offset, and allowed adjustments; test focus and geometry before fixing placement.
- Test with people in their actual positions. Review shadows, circulation, and visibility without entering the projection beam.
- Use the same image width when comparing proposals and mark each manufacturer’s distance reference. Do not mix distance from the cabinet front with distance from the lens.
- Review both the light path and cable and service routes. An optically possible position may need a different layout if it obstructs the audience or prevents equipment adjustment.
Technical questions and show decisions
Does every ultra-short-throw lens have zoom and lens shift?
Do not infer adjustments from the category. For example, the documented G62 UST lens is fixed, without zoom, and has specific support and movement restrictions.
Check features before choosing a position that depends on them.
Does short throw prevent every shadow?
It depends on lens, screen, and people positions. Draw and test the actual path; a commercial category does not prove that nobody will interrupt the light.
Can keystone compensate for an incorrect distance?
Check distance and optics first. Geometric correction does not create a new lens range and may reduce usable area. Check focus and readability after adjustments.
What should we rent for a shallow stage with a moving presenter?
Compare the same image width with possible screen, projector, and people positions. Assess standard throw from a location with a clear optical path, or short or ultra-short throw if its distance table and mounting instructions allow that position. The lens category alone is not enough: also review focus, adjustments, and screen surface.
Ask about a complete system or supplement venue equipment with a compatible lens, screen, installation, and operation as the project requires. Before confirming, define movement areas and test shadows, geometry, and readability in that layout. If no combination is suitable, compare another location or image size while retaining the audience visibility required.
How can I compare throw ratios using an image-width example?
Geometric example, not a model specification: optical distance = image width × throw ratio. At a width of 3 m, a ratio of 1.5 gives 4.5 m; 0.5 gives 1.5 m; and 0.25 gives 0.75 m. These mathematical starting points do not establish that a lens supports that size, format, or placement. They also do not by themselves describe cabinet-to-screen clearance.
Then check the exact model and lens table, measurement reference, offset, height, focus, adjustment range, and mounting hardware. For ultra-short throw, use the cabinet-and-screen drawing as well as optical distance. Send approximate width and a side-view photo so we can compare positions and options before the final plan.
Checks to guide decisions
| Symptom | Check | What it helps distinguish |
|---|---|---|
| Image too large | Distance and lens range. | Optical placement. |
| Distorted corners | Orientation, surface, and geometry. | Alignment. |
| Adjustment unavailable | Model, lens, and supported feature. | Actual capability. |
Installation and limits
Use exact mount and projector instructions for attachment, loads, and safety distances, rather than forum recipes.
Do not force movement or calibration on a lens with documented restrictions. Identify the assembly first.
Sources and context
Official model-specific documentation. Check variant, accessories, and conditions before applying settings or calculations.
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