The difference that matters
The Optoma GT2400HDR is brighter (4,200 lumens against 3,500). The Optoma GT2400HDR costs $200 less at the prices we observed.
Side by side
| Specification | Optoma GT2400HDR | Optoma ZH350ST |
|---|---|---|
| Brightness | 4,200 lm | 3,500 lm |
| Resolution | Full HD 1080p (1920 × 1080) | Full HD 1080p (1920 × 1080) |
| Native aspect | 16:9 | 16:9 |
| Throw ratio | 0.496:1 | 0.5:1 |
| Distance for a 10.5 × 8 ft 4:3 screen | 6′ 11″ | 7′ |
| Brightness on that screen | 38 fL | 31 fL |
| Light source | Laser | Laser |
| Rated life | 30,000 h | 30,000 h |
| Zoom | Fixed | Fixed |
| Lens shift | — | — |
| Input lag | 8.4 ms (1080p 120 Hz); 16.7 ms (1080p 60 Hz) | — |
| Price seen | $1,299 | $1,499 |
Highlighted rows differ. Figures come from each product's sources; room depth, distances and brightness are FOREference calculations using the same method for both.
Which should you choose?
Optoma GT2400HDR
Choose the Optoma GT2400HDR if your room has ambient light or a large screen or price leads the decision.
Optoma ZH350ST
Choose the Optoma ZH350ST if you prefer its maker, seller or ecosystem — the published figures do not favour it.
Before you buy either
- Check the room: room size calculator and ceiling height calculator.
- Confirm what each seller includes — accessories, software trials and bundles change often.
- Read the limitations on each full reference page.
FOREference compares published specifications; we have not tested these products side by side. How we work · Disclosure