Elegoo dominates consumer resin, and its current generation boils down to two machines: the Mars 5 Ultra (9K) for compact detail and the Saturn 4 Ultra (16K) for large format. Same features (AI camera, auto-level, tilt release), same ecosystem — the difference is size and resolution. Before buying, also read our resin process guide: the machine is only part of the story.
Mars = compact, minis, low price. Saturn = large volume, big batches, 16K. Both play in the best-MSLA league on the market. To grasp resin vs filament, see Resin vs FDM.
In brief
Two very polished MSLA (LCD) printers: auto leveling, an AI camera for monitoring, Tilt Release (a tilting peel that makes the peel more reliable) and a WiFi workflow. The Mars 5 Ultra targets figurines and small ultra-detailed parts; the Saturn 4 Ultra, large models and batch production. Budget ≈ $270 (Mars 5 Ultra) and ≈ $380–450 (Saturn 4 Ultra 12K/16K).
Mars 5 Ultra vs Saturn 4 Ultra
| Spec | Mars 5 Ultra | Saturn 4 Ultra |
|---|---|---|
| Screen | 7" · 9K mono | 10" · 12K or 16K mono |
| Volume (≈) | 153 × 77 × 165 mm | 212 × 118 × 220 mm |
| Detail (pixel) | ≈ 18 µm | ≈ 14–19 µm |
| Tilt Release | Yes | Yes |
| AI camera / auto-level | Yes / Yes | Yes / Yes |
| Best for | Figurines, jewelry, dental | Large parts, batches, pros |
| Indicative price | ≈ $270 | ≈ $380–450 |
Which to choose?
The rule is simple and comes down to part size:
- Mars 5 Ultra — if you mostly print figurines, miniatures, jewelry or tabletop prototypes. Compact, less resin wasted per print, superb detail. The best first step into resin.
- Saturn 4 Ultra — if you want large models, to fill the plate with batches of figurines, or to produce in series. The 16K pushes fineness on a big screen. Enjoy the "free" plate: filling a large bed costs no more time than a single part.
Many makers own both: the Mars for quick tests and detail, the Saturn for production. If you must pick one and you're torn, the Saturn does everything the Mars does… just bigger (but bulkier).
Ecosystem & features
Elegoo's strength today is the "quality of life" features once reserved for the high end:
- Tilt Release: the plate tilts to peel the layer gently → fewer failures, a more reliable peel.
- AI camera: remote monitoring and failure detection (detached resin, failed print).
- Auto-level & WiFi: simpler setup, file sending without a USB stick.
- Software: Elegoo ships its own slicer, and the Chitubox / Lychee ecosystem is fully supported.
- Wash & cure stations (Elegoo Mercury) for washing and curing (see the resin process).
Strengths & limits
Strengths
- Unbeatable value: the resin-market benchmark.
- Superb detail: 9K (Mars) / 16K (Saturn) for crisp surfaces.
- Modern features: tilt release, AI camera, auto-level.
- Mature ecosystem: plentiful consumables, profiles and community.
Limits
- Resin's constraints: toxicity, PPE, ventilation and post-processing are mandatory (see the dedicated guide).
- Brittle parts: standard resins stay fragile vs a good FDM.
- Footprint (Saturn): large format = more space and more resin per bath.
Who's it for?
For anyone who wants detail without breaking the bank: the Mars 5 Ultra is the best entry point for figurines, the Saturn 4 Ultra the pick for big volumes and production. In both cases, the real commitment isn't the machine but the safety and post-processing: read the resin process before buying. For another brand, see the Creality Halot-X1.
The resin benchmark: Mars 5 Ultra for compact detail, Saturn 4 Ultra for large format — provided you embrace post-processing.