Dust, filters and sealed engines
Whether the light path is dust-sealed.
- Standard
- Vendor
- ISO 21118
- Extension
- Status
- Standard reference being re-verified
How to compare it
Sealed optical engine
Unsealed DLP light paths can get dust 'blobs' on the image, a common long-term complaint on budget DLP.
Air filter
Filter type and the cleaning or replacement interval.
LCD and 3LCD panels are dust-sensitive, so filters matter more there. Note the cost and availability of spares.
Standard: Vendor
Spares availability
Availability and price of replacement lamps, filters, remotes and lens caps.
Total cost of ownership for lamp models.
Standard: Vendor
Deep cut
Sealed optical engine. Dust on the DMD window or lens shows as soft dark or light blobs that move with zoom and focus. Sealed engines and filters prevent it.
Terms on this page
Filter / sealed optics
Dust-sealed optical engine (most laser DLP) vs replaceable filter. ⚖ maintenance.sealed_engine, maintenance.filter