The difference that matters
The Optoma GT2400HDR costs $410 less at the prices we observed.
Side by side
| Specification | Optoma GT2400HDR | Optoma ZH400ST |
|---|---|---|
| Brightness | 4,200 lm | 4,000 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 | 36 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 | $1,709 |
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 ZH400ST
Choose the Optoma ZH400ST 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