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That sounds great. 55m is more than enough for me. Do you have some end caps to seal the ends of n100 / n120 rings? Or should I provide something?

@Dave_Hicks Sure, no problem. Though my 100m chamber has an inner diameter of only a little over 100mm. It can fit N100 stuff but not N120. My larger chamber can fit N120 stuff and even housings, but it maxes out around 55m.

Thank you for the info it is something I will look into. Dave has offered to send me some plugs that might fix the problem!

Liveaboard sinking This happened few days ago. Daytrip boat caught fire Yesterday These are starting to get quite frequent, unfortunately.

I would like to share my experience with the SEACAM Optical Precision Port (OPP) over the past 21 months. But before I go any further, let me declare upfront that I am a SEACAM ambassador - so I am obviously somewhat biased by my experience with what I regard as a truly exceptional company. That said, I also try to be as honest, objective and rational as I can. So the link below are my considered thoughts on the usability of the OPP in a very wide coimbination of locations and subject matter. Having used both the Nauticam WACP-1 (5 years) and the WACP-C (3 years) before making the switch to SEACAM, I believe that I have quite a lot of hands-on experience with water corrected optics. Based on that experience, for me the OPP is a truly exceptional example of optical engineering that has been thoughfully and carefully designed to solve two of the key problems underwater photographers face. Namely taking images in water with lenses designed to operate in air (different refractive indexes) and traveling with our equipment. I personally consider the OPP to be the ultimate travel lens as it does so many things so well in a relatively small package Since I joined Waterpixels several people have reached out to me for comments on the OPP, but I wanted to wait till SEACAM had completed their thorough and very objective testing of the system in their purpose built test tank. Pixel peeping of images taken on the fly underwater is not objective as it only provides an indication of the optical performance. SEACAM have really quantified what the OPP can do optically under very controlled circumstances with that testing and I highly encourage you to follow the link in my article and download the results of that testing. Which, in a word is impressive and fully reinforces my impressions from 21 months of field testing. Here's the link: https://indopacificimages.com/ultimate-underwater-travel-lens/

That is very generous! I will take you up on the offer, perhaps with two or three items if it's not too much trouble. An n100 and n120 extension ring. Ideally these can survive 100m. And perhaps a float? Like my HF-1 strobe float. I would be happy if that survived to 40 meters. I have dove these a bit over 30 meters. They are not as thick as the rings and ports, but they are no loss should they fail as well. I will message you for details. Cheers, Dave

Perhaps not a concern, but how strong is that cold shoe mount on an acrylic AOI housing? I am not confidence inspired by those even on my Nauticams to support anything heavy which might be prone to getting a whack. I might favor a cross bar solution.

If you want to send it to me, I can easily test it to the 100m that the Nauticam stuff is rated to.

@Adventurer In the case of my Nikon 60mm and Zen dome example above, there is no loss of focus range since the MFD of the lens is only a couple of millimeters beyond the dome. However, in other scenarios in which proper dome positioning involves placing the dome significantly closer than the lens's MFD, a small amount of close focus range can be lost. But you don't use a macro dome if you want to maximize magnification. It's for improving edge sharpness and/or restoring the air FOV so you can better shoot slightly larger macro subjects. I haven't tried using a diopter on the macro lens in these scenarios, but it seems like it could maybe work as long as you don't lose too much of your far focus ability.

Okay, one thing bothers me, if I start mixing housings and ports from different manufacturers. I'd need to know each manufacturer's distance from camera lens mount to housing lens port mount. I don't even know what that distance is called so I have difficulties searching for that information. Is it easily obtainable? For example, Isotta has a port for using WWL-C as stated above, and Isotta ports can apparently be used on S&S housings, but if the distance from camera to port hole is different between Isotta and S&S I expect to run into trouble. Same if I want to use S&S ports on Nauticam housing. Not saying it would be insurmountable but definitely something that needs to be handled.

I finally was able to borrow an n100 extension ring to get measurements and make prototypes of Nauticam n100 compatible parts. I can print out any size ring from 20mm on up. It all fits perfectly, but still needs to be tested in a vacuum sealed housing followed by a test dive. The basic design pattern and pressure resistance is well tested in the n120 versions I've been using for months. The person I borrowed the ring from is out of town for a few weeks, and I don't have a housing to test it, I need to find someone else to test it out. Any volunteers??

Thanks, great thread. I have some investigating to do. Lucky me that next week of my vacation will be rainy!

It's a drawback that it doesn't take front filters (though understandable why). I find that the Sea & Sea correction lens helps quite a lot with the Nikon 14-30 behind a dome port.

2200 mAh sounds totally legit. I guess 3600 model number it's rounded mWh.

We at WPX have never written that we want to save our users money, On the contrary 😜

Woah!!! Thanks. Just sent you a PM.

I don't believe it. We need some tests to confirm it's capacity. For what I know best 14500 (AA) Li-Ion batteries have around 1000 mAh. At 3.7V it's 3.7 Wh but the ad stated it's 4.89 Wh. The battery inside should be shorter than 50 mm to leave a space for a voltage stabilizer and charging circuit. So in my guess 1320 mAh for the lithuim inside is a scam. I've found 14430 with 1050mAh capacity and it's 3.78 Wh https://keeppower.com/product/keeppower-14430-1050mah-protected-li-ion-rechargeable-battery-p1443c3/ And another 14430 with 1300 mAh and it's 4.81 Wh https://www.akkuteile.de/en/lithium-ionen-battery/size-14430_100212_3661 So it looks possible if not take to account losses on DC-DC transformation. But it has low constant discharge current, so I think it would have low max pulse current.

I quite like Tamron lenses for topside photography. Lightweight, very sharp and good value.

Lauren - Can you take apart the plug? There may be a very tiny screw and also the o-ring is likely holding the insertion end together. When the two halves are apart, you will likely have to bend the cable to fit the channels within the plug. — Craig

accidentally overexposed on the strobes a bit but as I was shooting in raw I was able to take this down and give the photos a much more dramatic look by reducing the overall exposure. Quie pleased with some of these If anyone is in the South of the UK - these trips run from Plymouth with InDeep and a few out of Penzance compared to flying halfway round the world to see sharks at a distance this was an amazing experience. The sharks turn up eventually and then swim round and round you until you fill up your sd card or run out of batteries!

XTar equivalent: XTARXTAR AA 1.5V 3600 Lithium battery - XTARStable 1.5V 2.5A constant-voltage output for efficient power. Built-in LED charging indicator and low-battery alert for worry-free runtime

Hi Tim Sorry for the entire lost of your equipment during the fire on the boat. How many lenght do you need ? I didn't use the one we buy last year ? 2 year ago I can't remember. I can send you a part of, back to you. Sent me an email for the details Hugues

Ansmann is a distributor and relies on Asian third-party manufacturers, specifically OEM companies, to produce these batteries. I could be wrong but these aren't real Li-ion 1.5 V chemicals cells but micro devices. Lithium cells market is dominated by giants like Panasonic, Samsung SDI, LG Chem, and Murata. These cells consist of two main components: an internal 3.7V lithium cell, which is smaller than a standard AA and often in a 14430 format, and an integrated circuit, specifically a DC-DC buck converter, positioned near the positive terminal. This chip is responsible for stepping down the native 3.7V tension to a constant 1.5V, while also managing charging protocols and thermal protection. Companies like Tenavolts, which is Zhiyu Innovation, XTAR, Hixon, or large industrial plants located in the Shenzhen area, are the original manufacturers of this technology. IIRC the models I saw on Chinese sites cannot be charged with a normal NiMh or Lithium recharger but they needs a special charger, basically a 5V power supply.

Pricing & Availability: Sony E-mount: Released July 30, 2026, for $1,699 USD. Nikon Z-mount: Released August 27, 2026, for $1,799 USD.

Hi, Ansmann has developped new AA batteries with LI-ion technology. Capacity is 3500 mAh. What does this mean for strobes still using AA-batteries? Faster recyle time? Or is there no change to be expected? Price is about the same as eneloop pro's Info at: https://shop.ansmann.de/en/pure-power-3500-aa Thanks, best Michiel.