Tom Kline

PPS. 5000 Euros plus taxes, shipping etc.

PS. I suspect mainly lenses that keep a fixed length will have to be used.

Seacam did a live post on Instagram where some of these details are revealed (can still be watched). Weight is 2.9 kg but is compact if one dismantles it. Stuff can go inside the empty port extension. The two optical parts are flat so a bit like oversized hockey pucks - the larger one, the front port is about 18cm in diameter but only 4 cm thick without the shade, 6cm with. Thus far only lenses with a 77mm filter size but I would not be surprised if an 82mm version might be on the horizon. The Nikon 16-35 is fairly long so a shorter, squatter port extension might be in the future for other lenses. Hence my question above.

Correct! Alex Mustard has this and wrote about it some years ago after having it modified for his Subal housings. It was originally designed for the Superwide camera that had a fixed 38mm lens for the 6x6cm format so had a 90° angle of view. A bit narrower than what Seacam has come up with. As well the internal lens was for the Hasselblad series 63 filter size (same as series VIII, threading on internal lens same as filter retaining ring), quite a bit smaller than the corresponding part for the OPP.

Looks like a very clever design: https://www.seacam.com/en/optical-precision-port/#6910ccd3bd523-4 It is modular making transport a bit easier. Part of it is a dedicated large diameter (providing buoyancy) port extension. Seacam could build alternates to accommodate other lenses. Ask them about this at DEMA.

Yes this is a problem but is highly variable and have to adjust my technique accordingly. I avoid using strobes altogether for many shots but they are done during daylight hours. Often have to make "a change in plan"!!!

I have loads of experience shooting Pacific salmon (all 5 species found in Alaska). In daylight as well as in the dark. I have used regular wavelength (halogen and LED) but small sized wide angle lights for focusing as well as for me to see after dark. Flashing has no effect. Salmon are very responsive, however, to shadows. Spooked when the moon rose behind me and I moved!! The technique is to keep everything still so the gear seems in inanimate to them. Best to sit rather than stand as well unless behind cover. I have examples of my shooting techniques here: https://www.salmonography.com/Salmonid-Topic/Photography-techniques

I caution about over-editing. For example I got into an argument with my agent's representative about the species identification of a juvenile salmonid fish. The select image for publication that my agent had was the esthetic champ from the series. The next shot however showed the anal fin of one of the fish splayed out so all rays could see. I did a cropped super blow-up of the anal fin and emailed it back to win my case. (The number of anal fin rays is an important characteristic for IDing salmonids). Non-savers can also be used for context such as location of shots. Rejects are also useful for posting on forums, ROTFL ...

This camera is clearly aimed at those for whom spending more is better. Now a hypothetical customer can boast about having a 61 megapixel camera!

Super transaction from member SH Jeong from this ad: https://waterpixels.net/forums/topic/2629-fs-seacam-240mm-super-dome-s45-g-pro-viewfinder/#comment-17499 Thank you! Tom

This contradicts the results in the link from post #2 - see 300th flash test.

Interesting thread with some great links, thanks!!! FWIW I just finished refreshing and analyzing (using a MAHA analyzer-charger) two sets of 8 Eneloop Pros that I bought in early 2023 from B&H (they were in 16 packs). (Reason for refresh: Adult salmon are expected in my target creek rather soon). Batteries last used in early Autumn 2024 (before major snow). The capacities (from the analysis) were mostly in the 2400 to 2500 range with just a couple above 2500. Not too bad for oldish batteries. (These are labeled as being made by Panasonic. Near the seam is stamped 22-xxxx. The four x characters are a bit challenging read but the 22- suggests they were made in 2022.) At the end of each cycle the batteries were barely warm to the touch. I felt them a few times during the test and at no time were they hot, just warm (like 100°F/40°C). Hot water out of the tap is much higher. The above anecdote about hot batteries suggest defective batteries or charger.

OK the title is a bit tongue-in-cheek. I thought about this shot because of the on-going APS-C thread. The camera being used is the APS-C format Nikon D7200, DX in Nikon-speak. What is interesting is the above water portion shows the lens hood blocking part of the image suggesting a greater angle of view in air relative to in water. That is me in the background (wearing a cap). I was in front of the lens to better observe what I was shooting. Note the better viewpoint in the topside shot showing the set-up from the front compared from the other side of the creek. The back of the camera view better depicts the shallow conditions. The APS-C advantage here is a slightly shorter camera housing. My main alternative housings are for gripped cameras so much taller. BTW the salt marsh plants, Carex sp., have seawater around their base at high tide. I include as well a shot with the EMWL fully submerged. These are Pink Salmon. The offspring of these fish are due about 3 weeks from now. This species matures at age 2 so there are separate odd and even year broodlines. The population size odd year broodline is about an order of magnitude larger than the even.

I used a vintage monopod in the example (just under 2 meters long). I have also used other long pieces of aluminum (e.g. ~2 1/2 meter long antenna support - gold colored - in several of the technique photos) as well as vintage metal tripods. Keep in mind I am using them in freshwater. I have used the monopod pole in the harbor (seawater). Even freshwater is not so good for tripods and monopods so whatever you use it will be a sacrifice.

Your solution looks quite a bit more elegant compared to a simple rectangular piece of aluminum which is what I have been doing recently. In my case I am seeking to reduce negativity due to the EMWL system so use float arms. https://www.salmonography.com/Salmonid-Topic/Photography-techniques/i-8NTBjs5/A

The numbers following the dash in the model names reflect the chronological order of when the model was introduced so has NOTHING to do with magnification. Yes it should be possible to give a magnification factor but this is probably easier to do empirically as Chris did in the MFO-1 thread. The MFO-1 is more akin to a CMC than a SMC. I had been thinking of trying to use a CMC-2 with my 105 but now can trash the idea.

Hi Reefy Thank you! I most likely used a single flash mounted at 12 o'clock above the housing. This technique shot is from the same year: https://www.salmonography.com/Salmonid-Topic/Photography-techniques/i-SCFhVQk/A

I shoot quite a bit in tannic water. It ranges from iced tea to Coca-Cola. I understand northern FLA is more like coffee (from a Skin Diver article about fossil hunting UW from many years ago). One of the more challenging streams in my area was the location for the attached shots. I made a virtual copy of the OK version in LR and reset the WB to daylight (5500 °K), nothing else, before making the second jpeg. Shot taken with a Nikon D2X and 10.5mm fisheye so fairly old. I have not been back to this stream, which is unnamed, since. It is hard to get to as well as rather stained.

Interesting result! I have not done anything like that although your shoot reminds me of shooting developing salmon eggs in situ. For that I tried various combos mostly with internal diopters as well as the Nikon Micro-Nikkor zoom lens with NO focusing (AF off and no focusing gear) - port length was fixed at maximum length (the lens extends) - zooming used to control image size. Main issue was very shallow depth like your setup.

One reason for using LR is to avoid having to do all that. As well one can make multiple virtual collections based on alternative key word types for example, location, common name, scientific name, phase of the moon, month, year..... About 20 years ago I followed the example of of an "expert" whose used date and grouped by quality with selects in one folder etc. This became a nightmare... This was before LR came out. Thankfully it saved the day but those early files are still a mess. I have been using consecutively numbered folders and file names (generated when I took the pic) with separate ones for each camera. Larger folders for years. If a certain camera is used a lot in a given year there may be A, B, C folders for that camera that year. Separate folders makes it easier to collapse the list of files when looking at them inside LR. It also makes it much easier to keep track of things when doing back ups. Missing numbers are easy to detect.

You are still getting a 1.33x mag if that is the goal. Distance depends on focal length, i.e. greater with 105 compared to 60. I have rather limited facilities to do testing here - see above. Working distance can vary depending on ones port setup. One trick is to have a bigger air space (longer port) to reduce water path. Cannot use that trick if configured to use the EMWL as one needs a small air space inside the port.

ROTFL!!! My first guess was supermacro, maybe much longer working distance than any of the SMCs. Another guess is that instead of an add-on lens it is a complete port, sort of a macro analog of the WACPs. 105 or 60mm goes inside??? Kind of late for a 60 but might work with the Z50 macro.

Look at what Alex is testing!!!!!

I believe you are incorrect. One can certainly focus UW > 1:1. Folks have been doing that for years, e.g., using 1.4 teleconverters or internal (on the lens inside the port) diopters. With domes one is focusing on a close virtual image - this is the distance the camera lens focus is set at and can be read off the focusing scale (with a transparent housing!!!). Many lenses do not focus close enough to allow them to work behind a dome such as 50mm f/1.4 lenses with a typical min. focus distance of 0.45m. This is a big problem as well with medium format cameras. I know this because I have the Hasselblad EL housing that uses 8" plastic domes. The 50 and 60mm wide angle lenses that work with the housing focus to just 0.5m so special Zeiss made diopters were sold. As it took me years to find them I used standard off the shelf diopters that also worked. With a flat port one can typically use the entire focusing range of the lens. For example with the camera lens at infinity (virtual image distance) the lens is focused close up with the amount dependent on diopter strength so further rather than closer.

There is clearly a lot of variability in how people use LR. The lrcat file is generally rather small even in my case with 0.7 million pix. It is the previews file that takes up space and there are choices in how one does this. Some are big while others are small. One can set 1:1 previews to expire as well, which I did not do at first. One can delete the previews file which is the equivalent of starting from a backup file. I did this only once and that was years ago - when I did a version upgrade. The trouble was that I only saw grey rectangles until the previews were regenerated which can take some time - happened when clicking on the folder in library mode. The images appeared sequentially as they were generated. I had only a few 10s of thousand images back then. Just for laughs I have more images of three of the Pacific salmon species than Tim has in his entire catalog - see attachment. Note the large space to the left - those are the higher taxonomic categories further up from order (Salmoniformes). Be thankful if you are not a biology nerd!!!!!! BTW you will note that I have the common name at the bottom of the hierarchy so I only have to type in "so" for Sockeye Salmon and LR does the rest, which I do when importing into LR. If I used the scientific name I would have to correctly spell the genus name and at least one species name letter to get LR to pick the right keyword.