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Nauticam WWL-1 - Price: €950 - SOLD + float collar, hard lens cap, and neoprene lens cap Sony FE 28–60mm f/4–5.6 + focus ring - SOLD New prices: Isotta Housing for Sony Alpha A7 III & A7R III - New Price: €2,100 + manual trigger and moisture/leak sensor Sony A7R III A - New Price: €1,200 Sony FE 28mm f/2 + Sony Fisheye Converter - New Price: €250

It does pertain to this thread because the Back Scatter strobes are not compatible with many popular Sony A series cameras for TTL. The A6300 and A6400 being one of them. The Backscatter strobes do have a Manual preflash cancel thus Manual strobe shooting is supported but cannot do TTL.

No longer seeking the N85 macro port 65

I still have a 40 mm Extension (NX?) for the Sea&Sea housings. With Sea&Sea Cap. Shows some wear, minor scratches but is working perfekt. I moved to Nauticam quite a while ago and this was left in a drawer… Asking 175 € plus shipping included for Germany, EU+10 EUR, rest of the world I have to check). Also some Zoom-gears - which I’m happy to give away for free - just cover the shipping costs. 1 Zoom gear Nikkor 18-35 1x CX600 EF 28-80 USM III 1x CX600 EF 28-80 USM IV

tomorrow the news! https://www.mirrorlessrumors.com/canon-big-reveal-rf-14mm-f-1-4l-vcm-radical-7-14mm-fisheye-zoom-and-new-powershot-g7-x-iii-coming-feb-4/

Hi Wolfgang, unfortunately I can only compare it underwater and above water, but there it's clear. I've never used a macro lens behind a dome port – even though its use seems plausible in many cases. But since I lose the option of using close-up lenses, I would only do it in special situations – and whether the investment would be worthwhile is another question.

Hi Warmuth, Is this observed decrease in IQ, when you compare the lens behind flatport to the lens in air? Or does IQ decrease when using domeport and compare to IQ with planport? Or is it MFO-1 & planport vs. plain planport? Thanks, Wolfgang

What an excelent solution. Thanks for the file link. On my lens I replaced the rubber grip with 2mm cord (Aldi special) with a couple of lanyard loops and coincidentally used exactly the same clip. Because I sometimes take the WWL-C off during a dive to use the 24-50 and very occasionally with the SMC-3 (stupid small focus range and hard to use but better than nowt!) I have a nauticam bayonet mount for the lens attached to my right hand BCD shoulder strap so the security lanyard is a great backup :-). I think that I perfer your soulution so will have to comandeer some of the TPU in my wifes office.

With a 100mm lens (Canon) I can see a significant decrease in image quality due to CA and some softness in the corners.

This video is gold, thanks for sharing! I was looking for something like this for so long!

As far as I understand, the MFO-1 lens corrects for the optical aberrations introduced by using macrolenses behind planports and should have similar IQ to a macrolens behind domeport (?). For longer focal length (e.g. 90mm on FF), however, these aberrations are pretty small and neglectible. For shorter focal length (e.g. 50mm or smaller for FF), a domeport may increase IQ noticeably... Anyone can confirm this from real life experience? P.S.: I am using Sony 20-70mm (FF) and was using Zuiko 12-40m (MFT) behind Zen DP170 domeport (not for real macro, but for fishportrait). At the short end IQ is very good and certainly better compared to planport, but I am not shure whether the domeport brings improvement at the long end...

yes, a photo please because I couldn't create the problem today and can't figure out why or how it's happening!

Interesting.... I have only experience with using the built in flash on the A6300 and A6400 which from what I can tell have no ability to disable pre-flash. I'm moving into an A7RIII which has no internal flash and it was my intent to just run a manual trigger. None of which really relates to this flash. Please carry on.

UWTechnics TTL Converters for Sony and for Nikon were successfully tested with the newest Sea&Sea YS-D130R strobe. The TTL, HSS and M modes are supported. By the way, the circular tube brought a nice TTL for Sea&Sea strobe. YS-D130R strobe compatibility is officially confirmed now and will be included in the User Manuals of TTL Converters for Sony and Nikon. Canon and Olympus versions are in the work now.

Sony's camera menu doesn't have a built-in option for switching external flash to M mode. Therefore, a separate command, which isn't used underwater, was assigned (by TTL Converter firmware) to switch the flash system to M mode without pre-flashes. UWTechnics TTL converters were the first to use the WL command to switch the flash to M mode. Company developed the controlled M mode, allowing the user to manually adjust the flash power via the Sony camera's menu dial. The same time, the traditional manual flash adjustment via the strobe knob is also available. Here is the UWTechnics User Manual text:

Agreed, you’re absolutely right about shorter rides and reaching more remote sites / areas (pretty cool that you made it to Angaur!) It takes roughly 45 minutes from Malakal to German Channel if conditions are good, and a bit longer to reach Ngemelis area sites like Blue Corner. I didn’t think of that initially because, for me, the commute is part of the trip. The boat rides through the Rock Islands can be genuinely interesting. I guess it really depends on how flexible the operator and crew is. We would sometimes go looking for whales or pods of dolphins on the outer reefs, wait for the tides to pickup at German, or do a bit of sightseeing in or around the lagoon. I actually enjoyed that aspect a lot, perhaps more than elsewhere - when it wasn’t raining cats and dogs, which is fairly common in Palau 😆 Boat coats quickly became very good friends... Another factor is group size. Groups are generally smaller, although that was not always the case, as Palau has a history of land operators taking large groups. That does seem to be changing, thankfully, and you tend to have fewer people on a site than with liveaboard drops. Don’t get me wrong, I love liveaboards and have worked on them myself (just not in Palau) and appreciate the disconnection being on a boat away from it all offers, and how great and immersive the dive-eat-sleep-repeat cycle is. But when it comes to the diving itself, I'd say the main advantage of land-based diving is flexibility. You are not locked into a busy operating schedule with fixed dive times and meals and a trip schedule, and in that respect land-based operations can have the edge. That said, there is always a trade-off, and it really comes down to the operator. I remember some land ops that still left at a fixed time every morning, which rather defeats the purpose...

Sorry, I meant radius!!! 140 D has 69-70 R and 180 D has 110 R. I am estimating EP by looking from the front and marking off the apparent position on the outside of the lens, then measuring this distance back to the flange. I think Subal make some large radius / small diameter domes. Nauticam makes or used to make the same kind of dome for a particular 35mm lens, in N100 size. But it costs c. AUD $800 plus would need an extension which I don't have, at another $800 or so. So unless I can get the 100 macro working with the 180 dome, I can't justify buying the more compact large radius dome, since I don't need it for the 50 macro.

I took a break from shooting strobes at walls and went diving! The assignment this time was CFWA with a 15mm fisheye lens and the Maxi's with a warming filter and reduction rings. Visibility was a pretty hazy silty 15ft / 5m so reduction rings were a big help. Nikon Z8 w/8-15mm Fisheye lens, f11@1/30s iso400, Pair of Retra Maxi strobes with 4500k filters Nikon Z8 w/8-15mm Fisheye lens, f11@1/30s iso400, Pair of Retra Maxi strobes with 4500k filters Nikon Z8 w/8-15mm Fisheye lens, f11@1/40s iso640, Pair of Retra Maxi strobes with 4500k filters Dive buddy Nirupam testing out a Nikon ZR / Ikelite setup.

@Alex_Mustard had some posts on using a dome port with macro lenses, he typically used one of those small section domes for this, here's one article on this: Inside ScubaShooting Macro With A Curved PortExplore the benefits of curved macro ports for underwater photography, including improved image sharpness and a wider angle of view.I remember some posts on Wetpixel possibly, but can't find them right now.

Put an angled swivel on your primary regulator hose.

@dentrock The entrance pupil moves a fair amount with focus with all the macro lenses I have tested (from around 15mm to as much as 35mm+). So I measure it at multiple points from 1:1 out to a reasonable underwater shooting distance like 50cm and pick a spot in the middle of the range to center the dome around. It's promising that the EP may not move much with the Sony 100mm and that it seems to be located in an ideal place (not far back like the Sony 90mm and Sigma 105mm). How are you measuring the EP? I should note that I can't speak to the focusing issues you're experiencing. I'm just looking at sharpness in my testing. The Tamron 90mm with Zen WA-100 dome indeed gives me edge to edge sharpness like the Sony 50mm behind the same dome. Did the Sony 100mm behind the 180 port give edge to edge sharpness when you did manage to get shots in focus? I must admit I'm a little confused by you saying "Nauticam 140 / 70mm diameter" and "Nauticam 180 port (110 D)". I'm not very familiar with the Nauticam ports, but do you perhaps mean radius for the second numbers? Or maybe I'm just missing something? Again, I'm not very knowledgeable on Zen ports, but yes, I believe they also make fisheye ports with a smaller diameter dome. It was Matt Sullivan who first had me make him a macro port using the dome from the Zen WA-100 port, and it worked so well that I wanted one for myself as well.

If asking me, I cannot say. If it was meant as an argument I still cannot say. I do know that WL Command does not seem to turn off the preflash on my A6400. I use the UWT trigger, if I want manual with no preflash signal I set 0 on the UWT board. If I want TTL I select the position on the strobe matching or nearest the strobes I have. I would hazard a guess that the Back Scatter trigger plugged into the hot shoe translates, using built in software, between the camera hot shoe output signals and the Backscatter strobes via optical signals over the fiber cables. And just to say it again, I do not know. Maybe it is a question for Back Scatter to explain. I am satisfied with plain old optical TTL which the Backscatter strobes do not have. But that Inon, YS, Marelux, Retra (?) do have.

My (probably incorrect) understanding is that putting the WL command ON turns off pre flash and runs everything manual. Bill

So the Zen WA-100 port is only for Olympus housings (different from the fisheye port which has a smaller diameter)?