Image offset
For projectors without lens shift: how far the image sits above (or below) the lens axis.
- Unit
- %
- Standard
- Vendor (no common convention)
- ISO 21118
- Extension
- Status
- Standard reference being re-verified
How to compare it
Fixed offset(%)
Decides table vs ceiling height. UST projectors have a large fixed offset (the image starts well above the unit).
Marketing traps
- Fixed offset: No universal definition exists. '100% offset' can mean the image's bottom edge sits on the lens axis, or that it sits a full image-height above it. Store the convention in `note`.
Across the catalogue
Fixed offset
4 of 24 projectors list itHighest
- Optoma UHD35STx116%
- BenQ X3100i110%
- BenQ TK710STi103%
- Dangbei Atom100%
Deep cut
Fixed offset. Normalise to ISO §3.5 Yshift where we can derive it from a published diagram.
Terms on this page
Offset (fixed)
On projectors without lens shift, the image is projected above (or below) the lens axis by a fixed %. For example, +100% offset puts the bottom of the image level with the lens. This is critical for mounting and is badly documented. ⚖ optics.fixed_offset_pct