1 hour ago, JayceeB said:

I haven't been able to find a way to turn off lens correction in camera. You can turn it off in Lightroom after importing, but Lightroom defaults to applying it. I prefer lens correction on for the 20-50mm and 14-35mm, but lens correction off for the 8-15mm fisheye.

Lightroom only applies settings like this if you configure it to do so. You probably experimented with import settings and it's been set to do Lens Corrections ever since. Fortunately it's easy to change.

"I think, the marelux 180 glass dome or their 210 acrylic will not add much volume or load and dramatically improve lens performance."

@Adventurer

I'm considering the 180mm. I haven't had great luck with larger acrylic domes, as the ones I've used require weight to keep them from nosing up.

"I assume the freshly introduced Marelux Aquista 135D - which is Marelux‘s take on Nauticam‘s WACP lineup - will give you the highest image quality with that lens," @Adventurer .

For me, the improvement in image quality would need to be significant to justify the cost and heavier weight (for shore diving) of the Aquista 135D. A little out of my budget for testing purposes. I'm interested to see the results though, once someone is able to test and report back.

HI
Nauticam lists compatibility with Port 41 in its chart, without mentioning any restrictions. Could it really be used at 20mm with a flat port?

On 5/22/2026 at 12:41 PM, JayceeB said:

Does anyone have an estimate on what extensions will be required for Marelux/Nauticam 180mm and 230mm domes?

Marelux lists the RF 20-50mm PZ on the Aquista 135D lens chart with a zoom gear (#51211) and an extension 30, so zoom range from 28mm to 50mm. I don't see the lens on the port chart yet but my guess is that the extension 30 with a 180mm dome port would be a good starting point.

As a side bar, Marelux has also added the new RF 7-14mm fisheye zoom with zoom gear #51210 and extension ring 30 with the 140mm dome port with bayonet dome shade.