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Barmaglot last won the day on September 20

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About Barmaglot

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  1. I'm not a Nauticam user, but I thought that N85 stood for 85mm diameter of the port mount? The 16-55mm f/2.8 is not that big around - spec sheet has it at 73mm, which is barely larger than 10-18mm's 70mm, and smaller than 90mm's 79mm. As far as housing it goes, I'd be a lot more worried about the significant distance it extends to zoom - going by the photos, it looks like it goes from 100mm collapsed to something like 150mm extended, which has major ramifications on both flat and dome ports. At the very least, you'd need a much larger dome than 4.33" to keep it from bumping into the glass when extended and/or vignetting when collapsed.
  2. Last trip, I was carrying 24x18650 for lights, 16xAA for strobes, a spare battery for the camera and a powerbank containing 6x18650, all in my carryon. Eight flights in total, no issues.
  3. To the best of my knowledge, the regulations are: Li-ion batteries must be carried in the carry-on. The idea is, if one catches fire, it can be noticed and dealt with in the cabin, as opposed to the cargo hold. The batteries must be protected from shorting out. If you're flying with loose 18650/26650 cells, get plastic boxes to hold them. Maximum capacity battery pack allowed on board ins 99 watt-hours. This presents a problem with some of the larger video lights that come with humongous battery packs. Loose cells or multiple packs exceeding 99Wh in total are not a problem.
  4. Yes, the 10-18mm is constant f/4. Dome is eight inches.
  5. The Sony 16-50mm kit lens that I have can go as wide as f/3.5, but only when fully zoomed out. At 35mm, f/5.6 is as wide as it will go. Sony recently released a 16-55 f/2.8, which is by all accounts awesome, but it costs $1400, extends quite a bit to zoom, and there are no zoom gears yet.
  6. I was there last month; did two dives at Monad Shoal off the Philippine Siren, but the threshers only showed up for one, and then only for a few minutes. I was using a Sony A6300 with 16-50mm kit lens in a dome - I was afraid they wouldn't come close enough for my 10-18mm and I was right; the only shots I ended up keeping were at 35mm. You may get lucky and have the sharks come closer, or you might not. Since it was a no-strobe dive, I had the camera set to 1/320s, wide open and auto ISO, which ended up f/5.6 and ISO 3200, producing noticeable grain. Second dive I took my 90mm f/2.8 macro and put it in a dome, intending to use it as a short but fast telephoto, but the sharks didn't show. If I go there again, I'll probably use 10-18mm f/4 in the hope of the sharks coming closer, and drop the shutter speed to 1/160-1/250 - this should get the ISO down to around 800-1000.
  7. I ended up getting the Weefine WFL05S. Aliexpress was running a sale at the time and I got it for $305, with free shipping and no import taxes. I spent most of October in the Philippines, total 43 dives, although only three days (10 dives) out of that were in Anilao. I got to use the lens on several occasions, although not too many. As far as the lens performance goes, there was no vignetting that I could see. Working distance is quite short, about 2-3cm from the lens front element. Frame width is about 1cm. I used it with a magnetic adapter, and the lens has a protruding rear element that matches the adapter perfectly - the rear element sits completely flush with the adapter's threads that go into the port. If one were to use the lens without an adapter, it comes with a spacer that goes over the protruding element, allowing the lens to be screwed directly into the port without bumping into port glass. Autofocus tends to hunt for a while, but is manageable as long as the camera is held still. Some uncropped samples: https://drive.google.com/open?id=1P7h8a7szaeFI0PAiANZ-6w5dZe0NpQZK https://drive.google.com/open?id=1edgltAMZF1Jvj9nl9HNvlZfPNUbVlJns https://drive.google.com/open?id=1T4fNAKJaA_8ow9qFJmA60IVALPJ42ofd https://drive.google.com/open?id=1U7lmAS9QJ63W0tj2C7jXxxIUXfz_uNBv
  8. The ring on 16-50mm lens operates both focus and zoom, depending on camera mode. If the camera is set to AF-A, AF-S or AF-C, the ring will only do zoom. If the camera is set to MF, then the ring will only do focus, and the only way to zoom the lens on A6xxx series bodies is by the small rocker on the left side of the lens, which is inaccessible in a housing. If the camera is set to DMF, then the ring will zoom until you half-press the shutter, at which point it will start focusing. Keep in mind that this behavior is specific to the 16-50mm kit zoom, and possibly other power-zoom lenses - I don't have any of those, so I can't confirm. Lenses without power zoom such as 10-18mm f/4 have separate zoom and focus rings, and with most housings, only one of those (typically the zoom) can be operated while the housing is sealed. In these cases, you usually set the camera to one of the AF modes and use the knob to operate the zoom. When shooting macro, DMF is useful even if you can't operate the focus ring - I shoot my A6300 with the Sony 90mm macro lens, and while it's pretty good about achieving focus on something, with the extremely thin depth of field macro photography suffers from, this something can be the wrong part of the subject. Shooting in DMF mode with focus peaking turned on, I can see which part of the subject the camera has focused on, and then move the camera forward or backward a little bit while the focus is locked, so that the eyes, or the rhinophores, or something else is (hopefully) in focus.
  9. See pages 7 and 14 of the user manual here: http://www.fantasea.com/manuals/1525_Manual.pdf Note that you need #2201 zoom and focus gear to connect that knob to the lens ring, but if you have ordered the housing as a kit with the #2101 flat port, it should be in the package.
  10. Fantasea housings have the zoom knob on the left side of the body, not the port - don't worry, you'll be able to zoom.
  11. AFAIK, zooming the kit lens via the body is a function only present on A5000 and A5100. What housing are you using that won't you access the zoom ring?
  12. Sony APS-C with kit 16-50mm does that too. Nikon FX with 60mm macro, or DX with 40mm macro and MWL-1 is another option. Sony or Fuji APS-C with a 50mm macro also work with MWL-1, albeit with a reduced FoV.
  13. If you try to use a dry diopter underwater, it will not work. Lenses work by having a different refractive index than the surrounding medium, but the refractive index of water is much closer to that of glass than air, so a glass lens immersed in water has a significantly reduced effect on light passing through it. The underwater diopters work by having air inside the lens assembly, which substantially increases complexity and cost - but cannot be avoided in underwater usage. Salt water may also corrode metal parts of lenses not designed for immersion. You can use a dry diopter inside a port if there is sufficient free space, but then you lose the ability to focus at longer distances, since you cannot remove the diopter while the housing is sealed. Extension tubes can provide a similar effect.
  14. Turn the strobes inward, either at an angle if you have some distance, or, if you're very close, directly facing each other. If the surroundings allow, you can even put one or both behind the subject, facing the camera.
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