At a glance
Quick verdict
Investigate the UHD35STx if lamp access is easy and its complete current system cost is attractive. Favor the UHZ35ST configuration when frequent use and avoiding routine lamp replacement justify the purchase difference. Neither choice removes the need for precise short-throw placement.
Side by side
Compare the documented details
Tinted rows show differing source entries, including unresolved discrepancies; they do not mark a winner.
| Feature | Optoma UHD35STX | Optoma UHZ35ST |
|---|---|---|
| resolution | UHD (3840x2160) | UHD (3840x2160) |
| Manufacturer-rated brightness (retain labels) | 3,600 lumens | 3,500 lumens |
| light | Lamp | Laser |
| Manufacturer up-to source-life claim | 4000 (Bright), 15000 (Dynamic), 10000 (Eco) | 30,000 hours |
| Published throw information | 0.5:1 | 0.496:1 |
| screen | 36.43" ~ 300.53" diagonal | 36" ~ 300" diagonal |
| speaker | 10W | 15W |
Similar lens class does not mean a drop-in replacement
The documented ratios are 0.5:1 and 0.496:1. At a 100-inch 16:9 image their nominal lens distances differ by only about a third of an inch. That illustrates the similarity in optical class, not mounting interchangeability. Offset, screw positions, chassis and ventilation remain exact-model requirements. Before replacing one with the other, check the drawing against the existing bracket and screen rather than assuming the near-identical ratio settles everything.
Compare ownership without inventing lifetime savings
The lamp model’s published life varies by operating mode; the laser model has a long light-source rating. Neither figure is a complete ownership-cost calculation. Obtain an actual purchase quote and genuine replacement-lamp price, then consider how many hours you expect to use the projector and how awkward service access will be. We have not measured failure rates, electricity bills or calibrated brightness, so this comparison does not claim a guaranteed payback period or universal picture-quality advantage for laser.
The signal and sound system can decide the choice
Both require resolution and refresh rate to be read together. A fastest lower-resolution gaming figure is not 4K at that refresh rate. UHD35STx documentation also warns about adjustment functions disabled in Enhanced Gaming. For audio, its documented optical output and the UHZ35ST datasheet’s eARC connection may matter to different systems. Check the actual receiver, soundbar and supported format path. One connector label is not a blanket promise of every surround format or feature.
Which setup fits which buyer?
The lamp model may suit occasional use with convenient maintenance access; the laser model deserves attention for frequent operation or a difficult mount. A buyer whose main priority is accurate movie color should compare measured demonstrations rather than treating either light source as a picture-quality score.
Optoma UHD35STX
Product summary
Choose the lamp route when purchase cost and practical lamp service make sense for the intended use.
Optoma UHZ35ST
Product summary
Consider the laser route when regular use and access make routine lamp avoidance valuable.
Questions before you buy
Is the higher lumen figure the winner?
The published ratings are close and do not establish the result after calibration. Screen, mode and room conditions should stay consistent in a real comparison.
Will laser mean no maintenance at all?
No. Removing routine lamp replacement does not remove ventilation, cleaning, access or other component-service needs. Follow the exact unit’s manual.
Your decision
Before you choose
Choose the ownership routine you can live with, then verify the exact gaming and audio configuration. That is a more durable decision than combining the brightest rating, longest life and fastest latency from different modes into one imaginary operating condition.
SHOPPING DETAILS
See the Optoma UHD35STX on Amazon
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See the Optoma UHZ35ST on Amazon
Want to check the current price, see more product photos, or read additional customer reviews? You can find the exact model on Amazon.
Affiliate purchase link · Levanta