Marelux launches the MX-A7RVI for the Sony a7R VI, 125mm port and built-in flash trigger. Price, specs, and comparison with the Nauticam NA-A7RVI.
Barely a month after the Nauticam NA-A7RVI arrived, the subject of our previous article, Marelux has released its own housing for the same camera. For the underwater photographer eyeing the Sony a7R VI, that changes something important: choice.
The MX-A7RVI carries the anodised aluminium architecture that has built Marelux's reputation since it entered the mirrorless housing market. Dual locking system, designed to close with minimal effort while staying near impossible to open by accident. Vacuum valve pre-installed with a hand pump, to check the seal before every dive.
Port diameter reaches 125mm, the widest on the market according to Marelux. In practice, that makes mounting large macro lenses and wide-angle domes easier without juggling extension rings. The quick-release baseplate withstands 50kg of force, with a system that locks the camera in place while staying simple to operate between dives.
A manual flash trigger is available as an option, rated for 10,000 triggers on just two CR2032 batteries. For anyone stacking dives over a week-long liveaboard, that is the kind of detail you only notice when it is missing.
The MX-A7RVI alone lists at €2,950 through Bluewater Photo. The Nauticam NA-A7RVI, for comparison, starts at €4,200. The gap, around €1,200, is not trivial when a full setup (housing, dome, port) runs €5,200 to €7,800 once accessories are added anyway.
It is not that Marelux is cutting quality. It is that the brand, newer to the high-end mirrorless segment, is playing the value card to carve out space against a player established for decades.
I already covered the Nauticam vs Ikelite vs Seafrogs match-up for this same camera, so I will not repeat it here. What changes with Marelux is that this is no longer a comparison across tiers (pro versus leisure). It is a comparison between two pro housings, with two different pricing philosophies.
Nauticam leans on the maturity of its N100 ecosystem, with the widest range of compatible ports and domes if you already own Nauticam gear. Marelux leans on a wider native port and a more accessible entry ticket for anyone building a complete system from scratch.
For the photographer who already owns Nauticam domes, switching brands makes no sense. For the one building an a7R VI kit from zero, the price gap is worth a close look.
This kind of housing targets the same audience as the Nauticam: serious, semi-pro or pro underwater photographers who want the a7R VI's resolution and burst rate without compromising on ruggedness. The difference is that the entry budget breathes a little easier.
For those starting out in underwater photography, the question stays the same as with any housing costing several thousand euros. Gear never replaces mastery of buoyancy, framing and natural light, and that is what we work on first in AquaExposure training.
Competition between pro housings, in the end, mostly benefits those who take the time to compare before buying.
The Marelux MX-A7RVI starts at €2,950 through specialist retailers such as Bluewater Photo (housing only, without dome or port). That is around €1,200 less than the Nauticam NA-A7RVI for the same camera.
A manual flash trigger is available as an option, rated for 10,000 triggers on two CR2032 batteries. It is not included in the housing's base price.
The two brands target different profiles. Marelux leans on a more accessible entry price and the widest port diameter on the market (125mm), useful for large macro and wide-angle lenses. Nauticam remains the reference for accessory ecosystem depth and track record on the pro segment. The question is not which is better, but which fits your budget and use case.
The MX-A7RVI is rated to 100 metres, like most premium aluminium housings on the market. That is more than enough for nearly all recreational and technical recreational diving.
