Our take
Optoma's S343 is a presentation projector with native SVGA 800 × 600 and an explicitly stated 3,600 ANSI lumens. Its 1.94–2.16:1 throw range, 1.1× manual zoom, replaceable 203 W lamp, HDMI, VGA, and USB power output support a planned classroom or meeting-room system. The panel's 4:3 format and limited detail are the main tradeoff: an HD input does not create a native HD image. The USB port can power a separate HDMI dongle but is not a built-in streaming platform. Choose the S343 when simple data projection and a method-labeled model rating matter more than modern image detail.
Basic classroom or meeting-room projection where SVGA content and a documented ANSI model rating are acceptable.
It is not for native HD or 4K, ultra-short-throw mounting, battery operation, or integrated streaming apps.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Optoma specifies native SVGA and a clearly labeled 3,600 ANSI-lumen rating.
- The 1.94–2.16:1 throw range and manual zoom help plan a conventional room position.
- HDMI and VGA inputs cover common external presentation sources.
What to weigh up
- SVGA 4:3 has less detail and widescreen area than WXGA or Full HD.
- A 203 W replaceable lamp needs a lamp-hour and condition check on a used unit.
- USB power can feed a dongle but does not establish onboard streaming apps.
The key details
| Model covered | S343 |
|---|---|
| Image format | Native SVGA 800 × 600 |
| Rated light output | 3,600 ANSI lumens |
| Placement | 1.94–2.16:1 conventional throw; replaceable lamp |
Performance figures are manufacturer claims. Source checked October 8, 2026. Regional models and included accessories can differ.
What the features mean for you
SVGA is best for simple data, not fine video detail
Optoma specifies native 800 × 600 SVGA with a 4:3 aspect ratio. That can fit basic presentations and older computer output, but it gives small text and detailed video fewer pixels than a WXGA or Full HD model. The projector may accept modern signals through HDMI, yet the physical image remains SVGA. Consider the distance from viewers to the screen and the content's smallest labels before selecting it. If fine spreadsheets, captions, or widescreen films are central, the S343's low native format is a real compromise rather than something that an input resolution can solve.
The ANSI label gives the brightness figure context
Optoma states 3,600 ANSI lumens for the S343. This measurement label makes the model rating more comparable with other specifications that also use ANSI. It does not show the output of a particular used projector today. Lamp hours, mode, screen size, and ambient light change the visible image. Ask for the lamp timer and view the projector in a setup close to the intended room. The rating can help shortlist the model for a meeting room, but it should not substitute for an inspection of the actual projector and screen.
Check the throw range against the available room
Optoma lists a 1.94–2.16:1 throw range and 1.1× manual zoom. That is conventional placement, so the projector needs a measured lens-to-screen distance rather than a position directly beneath the image. Measure the screen width and compare the mount location with the specification sheet. Zoom adjusts size within the lens range; it does not shift the image sideways or turn keystone into optical correction. A fixed mount should be centered and aligned before image correction is applied, because digital keystone can reduce usable image area.
USB power and HDMI are different from a smart projector
The S343's HDMI and VGA inputs connect external players and computers. Optoma also provides a USB power output that can supply an HDMI streaming dongle. That power port is not evidence that apps run inside the projector. Select a compatible external source if online video is part of the setup, and confirm the room's audio path because an external player may need separate speakers. The product page lists a built-in speaker, but its suitability depends on room size and audience. Check the exact connections on a used unit before planning a permanent cable route.
Inspect the replaceable lamp before relying on output
Optoma specifies a 203 W replaceable lamp. Ask for its hours, look for uneven color or dim patches, and test focus, fan operation, HDMI, VGA, remote, and USB power. The model's original 3,600 ANSI rating does not report a lamp's remaining life or the condition of an individual projector. AC operation means it belongs near an outlet and should be treated as an installed room device. If low maintenance, native HD detail, or built-in apps matter more than compatibility with an older presentation setup, compare a current LED or laser projector.
What else to compare
Compare Casio XJ-M240 for WXGA detail and a laser/LED hybrid source, or BenQ MW663 for another presentation model with a stated ANSI rating.
Before you buy
Is the S343 native 1080p?
No. Optoma specifies native SVGA 800 × 600; supported HD inputs do not change the native resolution.
Does Optoma label 3,600 lumens as ANSI?
Yes. The exact-model specification sheet identifies 3,600 ANSI lumens for the S343.
Does its USB port mean it has streaming apps?
No. Optoma describes USB power for an external HDMI dongle; app support belongs to that separate source device.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Optoma S343 specification sheet ↗ — checked October 8, 2026.
- Optoma S343 product page ↗ — checked October 8, 2026.
- Optoma S343 specification sheet ↗ — checked October 8, 2026.
The decision
Choose the S343 for a measured, outlet-powered room that accepts SVGA and uses external presentation sources.
Is it the right fit?
Check the exact model and today’s offers on Amazon.