Elegoo Mars 3 Pro

The Elegoo Mars 3 Pro is the 2022 refinement of the Mars 3. Screen, resolution and build volume are identical between the two; the premium buys a plug-in carbon air purifier, a 9H tempered glass protector over the panel, a Fresnel lens in the optics and a stiffer Z bracket.

Build volume is 143×89.6×175 mm with a 6.6-inch mono 4098×2560 panel at a 35 μm pixel (732 PPI). Light comes from 36 COB UV LEDs behind a Fresnel lens at 405 nm, rated at 92% uniformity. Elegoo quotes 30–70 mm/h on Z, but reviewers measure the same 30–50 mm/h as the plain Mars 3. A 3.5-inch touchscreen runs the machine, there is no wireless and files load from USB; it weighs 5.2 kg and ships with a 24 V 3 A (72 W) brick.

Pros

• True 4K mono at 35 μm — Age of Miniatures rates out-of-the-box detail among the best in this price bracket
• The air purifier plugs into a port inside the chamber, so swapping the filter takes seconds, unlike the built-in unit on the Mars 2 Pro (Tom's Hardware)
• 9H tempered glass over the panel: cured resin lifts off without scratching the LCD, and a spill no longer kills the screen
• The Fresnel lens evens out exposure across the field, rated at 92% uniformity, where the plain Mars 3 under-cured toward the edges
• PFA release film with lower peel force makes parts easier to remove and tears fewer thin supports (3DWithUs)
• Tom's Hardware logged zero failed prints across the whole review, and the plate still levels with two bolts

Cons

• The official 30–70 mm/h claim is not backed by testing: 3DWithUs, 3DSourced and the 3DToday database all list the same 30–50 mm/h as the Mars 3, on identical optics
• Roughly a $100 premium over the Mars 3 for upgrades Age of Miniatures prices at about $50 if you add them yourself
• Noisy fans, no auto leveling, and resin in the vat climbs to about 43 °C over a four-hour print, so exposure needs adjusting
• A documented family fault — restarts at print start on the Mars 3, 3 Pro and 4; Tom's Hardware also warns the purifier port looks like USB but carries 24 V and will fry a flash drive

The Mars 3 Pro makes sense for people printing miniatures and master models in a living space: the filter and the glass protector save both nerves and the cost of a replacement panel. In a workshop with proper ventilation the gap to a plain Mars 3 nearly disappears and the premium does not pay off.

Bottom line: a tidy but incremental upgrade over the Mars 3, now discontinued and sold as leftover stock. Mars 3 owners have no reason to switch; if you want a current machine with warranty, look at the Mars 4, Mars 5 or Mars 5 Ultra.

Reviews

• Tom's Hardware — Elegoo Mars 3 Pro Review: Cleaner Air, Same Great Detail
• Age of Miniatures — Elegoo Mars 3 Pro Review (miniature painter's take)
• 3DWithUs — Elegoo Mars 3 Pro Review and Testing
• 3DSourced — Elegoo Mars 3 vs Mars 3 Pro: What Actually Differs