Marelux new Aquista 135D water contact wide angle lens is ready for shipping. This is the third lens in the Aquista line and the first dry mount lens not requiring a flat port. Depending on the camera lens being used the Aquista lens mounts direct to the extension ring required for that lens. With commonly used lenses like the Sony FE 28-60 & 28-70mm the Aquista 135D AOV is 130 degrees. With lenses like a 24-70mmm as you zoom in the lens will work out to 135 degrees (diagonally) at around 26/27MM. This new lens retails in the US For $2599.00. Go to the Optics section on the Marelux.co web site to download the lens compatibility charts.

Technical Specifications

- Dimensions:180mm Outer Diameter x 143mm

- Body Construction:Hard Anodized Aluminum Alloy

- Lens Construction:6 elements in 5 groups

- Lens Coating:Anti-corrosion Coating on the outside of the dome. Anti-reflection Coating on other surfaces

- Field of View (diagonal):135°

- Weight (Air): 2210g / 4.87lb.

- Weight (Underwater) :Neutral Buoyancy

- Port Mount:Series 5

- Depth Rating:100m

Edited July 2Jul 2 by Phil Rudin

That’s great compact looking news.

Looks like 2026 is the year in which the high-end underwater optics monopoly is finally broken up.

I took a quick glance at the Aquista 135D port chart and the Canon selection of lenses is still very limited.

„Must-have Candidates“ that I would love to see listed:

• Canon RF 20-50mm F4L IS USM PZ most important new candidate!

• Canon RF 24-105mm f4-7,1 IS STM (will need a zoom limiter, but Marelux RF15-30 STM zoom gear fits this lens)

• Canon EF 28-70mm f/3.5-4.5 II

  (the historically best Canon Zoom lens recommended for use with the Nauticam WACP-1, costs just approx $70 in the used market and needs a Canon RF-EF Adapter to work)

• Canon RF 24-50mm f4,5-6,3 IS (dismal lens, but the noobs love it, so MARELUX gotta list it for completeness; as it will very likely work)

• Canon RF 28-70mm F2.8 IS STM (very likely to work)

Edited July 3Jul 3 by Adventurer

I am sure lenses will be added and removed as we get user feedback. For Sony I will be trying the 28 F/2, Rokinon 28-60 F2.8 and a few more.

6 hours ago, Adventurer said:

That’s great compact looking news.

Looks like 2026 is the year in which the high-end underwater optics monopoly is finally broken up.

I took a quick glance at the Aquista 135D port chart and the Canon selection of lenses is still very limited.

„Must-have Candidates“ that I would love to see listed:

• Canon RF 20-50mm F4L IS USM PZ most important new candidate!

• Canon RF 24-105mm f4-7,1 IS STM (will need a zoom limiter, but Marelux RF15-30 STM zoom gear fits this lens)

• Canon EF 28-70mm f/3.5-4.5 II

  (the historically best Canon Zoom lens recommended for use with the Nauticam WACP-1, costs just approx $70 in the used market and needs a Canon RF-EF Adapter to work)

• Canon RF 24-50mm f4,5-6,3 IS (dismal lens, but the noobs love it, so MARELUX gotta list it for completeness; as it will very likely work)

• Canon RF 28-70mm F2.8 IS STM (very likely to work)

I have sent your lens suggestions to the design team for consideration and they are in the process of additional lens testing.

Also be aware that adapter rings for Nauticam and Sea & Sea are ready to ship so that the Aquista 135D can be used with those housings. Adapters for subal , seacam , hugyfort and Isota will also be coming. These adapters also allow the use of many Marelux ports and extensions on the listed housing brands. For Nauticam I believe N120 will be coming first.

There will be an N100 adapter eventually?

7 minutes ago, Grantmac said:

There will be an N100 adapter eventually?

Many Nauticam users are already using the N120 to N100 35.5 so it will be linked to demand for N100. I suspect it will come in N100 but no conformation at this time.

I have the n100 to n120, I just wasn't sure if it would be too much extension by the time you add the n120 to Marelux adapter

On 7/3/2026 at 1:23 AM, Adventurer said:

I took a quick glance at the Aquista 135D port chart and the Canon selection of lenses is still very limited.

I think that is the biggest hurdle in the dry and wet contact options (from both Nauticam and now Marelux). I would LOVE to see a variety of canon options and field reviews of those lenses. Or even just field reviews of 1 or 2 lenses (like the 15-30 at 30 on the fullframe) Nauticam just pushes most lenses up to the WACP-2 if shooting full frame. So while Sony and the 28-60 is the go too - us Canon shooters are left with a few meh options and no good field reviews for many options. Please no EF lenses....

7 hours ago, ColdDarkDiver said:

So while Sony and the 28-60 is the go too - us Canon shooters are left with a few meh options and no good field reviews for many options.

True. But I think also mainly due to the fact that companies such as Nauticam and their dealers are not willing to deal with smart-ass customers who will complain about vignetting in online reviews.

As in this forum you will not find the average Joe I would like to offer you a more geeky take on this problem and a viable solution:

As Canon RF shooters we have various optics that use digital lens corrections which are heavily debated online. This results in quite a few RF lenses that will not project a full image circle on a full frame sensor at their widest focal length, such as the RF 24-50 STM, but also highly-priced L lenses , such as the RF 14-35 F4 L and RF 20-50 F4 L.

(sony with the 28-60 has the problem too, but nobody seems to talk about it)

What can you do about this?

1.) Look beyond Canons zoom range values and get a WACP/Aquista lens candidate that starts at 24 or 20mm instead of 28mm, as these will usually project a full image circle on sensor when zoomed in.

2.) don’t get an L lens with a wide opened front glas, get the more lightweight grey non-L version of a RF lens instead, to avoid having issues peeking through a tight porthole. Here the best example is choosing the RF24-105 STM over the more expensive USM L version. You will not need / shoot the more wide open aperture when shooting underwater.

3.) be okay with not using the full zoom range, so the RF24-105 STM will not extend too much and not move the entrance pupil dramatically when zoomed from 24-70mm. Various land-based reviews of the Canon 24-105mm STM validate it as an ultra-sharp competitor and point out that it‘s worthwhile saving $1000 when choosing it over the constant more open aperture L version.

On my Ivanoff Corrector Port I can use it up to 90mm, which makes it even more flexible. It has proven to be one of the sharpest underwater knives in my toolbox and I highly recommend it to underwater photographers and videographers.

However it’s not listed in any of the manufacturers portcharts, probably for the above mentioned reasons. I encourage everyone to give it a go. The zoom gear that you purchase for an RF15-30 with your housing brand will also fit the RF 24-105 STM.

Edited Sunday at 08:26 AM4 days by Adventurer

On 7/5/2026 at 1:18 AM, Adventurer said:

Nauticam and their dealers are not willing to deal with smart-ass customers who will complain about vignetting in online reviews.

I don't think it is this as much as it is really easy to over zoom underwater and then be frustrated with the results. Are you at 24 or 28? Sometimes hard to tell. I know I would mess it up. Or maybe I just identified myself as a smart ass customer.

You bring up many good points- I really struggle with some of the lenses not projecting fully on the sensor, only because I often find that when you put a lens behind a dome, sometimes the canon profiles get wonky. Or they do stupid things like try to correct a fisheye....like I bought a fisheye for a reason! So you have to turn off the canon profile which then adds to some pretty heavy vingetting and then cropping to not have a meh to bad photo. How will canon lenses and their profiles work with the Aquista 135d? Would be great to know.

Just because there will be caveats, that doesn't mean we don't want reviews. For example - the 15-30 STM lens should work as a 130 degree lens at 28-30 (sometimes on Nauticam options) - I would love to see examples of that. Can we see that same option for the Aquista 135d? If so, that would help me want the lens. If the 24-105 STM also worked well but one needed to zoom a bit and doesn't get past 50, I'd just love to see what it looks like behind these dry (or wet) optics. Its not like we don't have tons of caveats and work arounds for all of our time underwater to deal with the challenging lighting conditions.

I am a Sony user so I have not tested many Canon lenses full frame but I am curious why the most obvious Canon RF 28-70mm F/2.8 IS STM lens is not listed on the Nauticam or Marelux page for wet wide lenses. It seems small enough and has an expectable minimum focus distance.

With the two Nauticam lenses ( WACP-C & WACP-1) and the Aquista 135D the lenses are designed to be their widest at around 28mm with Nauticam at 130 AOV max and Marelux at 135 AOV max. The only three full frame lenses I am aware of that will zoom through the entire zoom range with wet wides are the Sony 28-70mm and 28-60mm kit lenses plus the internal focusing $2900.00 Nikon Z 24-70mm F/2.8 S II which works with the WACP-1/1B and WACP-C with the proper port extension's. The 28-70mm offering give an AOV range from 130-59 degrees while the Sony 28-60 gives an AOV of 130 to 69 degrees. Many Z users have adopted the Sony kits using an adapter to avoid the expensive Nikon lens. I don't believe Sony lenses can be adapted to the Canon RF mount but I could be wrong.

Any of the other lenses listed regardless of a starting point of 14mm, 16mm 24mm are all going to need to be zoomed to 28mm to get to 130 degrees without vignetting. Then be zoomed out until they stop or hit the wet lens which is the case with lenses like the Tamron 28-75mm which extends from 28-40mm before hitting the wet lens and gives an AOV from 130 to 90 degrees but only with WACP-1/1B. I don't expect that a 24-105mm would do any better. These limitations are listed on the Nauticam port charts but have not yet been added to the Marelux charts.

Next you have the issue of port extension sizes on full frame. Nauticam has both N100 and N120 sizes which complicates the issue somewhat while Marelux uses the five inch system for all current full frame housings.

Last you have the issue of the diameter of the wet lens. If you look at WWL-1/1B, WACP-C and WACP-1 they all are widest (130 degrees) at 28mm and get progressively better in terms of corner sharpness and use at lower F/numbers the greater the diameter. The larger the diameter the greater number of lenses that can be used as well with the $11000.00 WACP-2 at 280mm having the greatest number of lens options. With WACP-C at 170mm, Marelux 135D at 180mm and WACP-1/1B at 190mm you should be able to extrapolate out to get an idea of what each wet lens should be able to do in terms of lens selection and the rest.

None of the charts for full frame lenses list any primes that I am aware of but that could change going forward. I have a few of the excellent Veltrox primes for lens use above water and intend to try the Viltrox AF 28mm F/1.8 for Sony at some point with Aquista 135D to see how it compares to the lovely Laowa 10 and 12mm F/2.8 offerings. The Laowa 12mm works very well in the Marelux 140mm dome and makes a very small package at a rectilinear 122 degrees.

I see extension rings for using Nauticam ports on Marelux housings, is there a forthcoming extension for doing the opposite?

52 minutes ago, Grantmac said:

I see extension rings for using Nauticam ports on Marelux housings, is there a forthcoming extension for doing the opposite?

Yes, Marelux to Nauticam in N120.