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John R McMillan

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About John R McMillan

  • Rank
    Damselfish

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  • Gender
    Male
  • Location
    Washington State
  • Interests
    Underwater photography in freshwater, especially rivers.

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    United States
  1. I am looking to purchase a Nauticam N100 macro port for a Sony 90mm. Thanks for any help you can provide.
  2. I do too, and I do follow you: great shots by the way! I shoot only in freshwater, mostly salmonids. Here is my account: https://www.instagram.com/rainforest_steel/
  3. I'll dive in and offer my opinion. I use an A7RII underwater. I have used both a6500 and a7II above water, but not below, and also used the lenses you mention. Here are my thoughts: 1. I think the a6500 is generally superior, much faster and more accurate autofocus. I think image quality is similar between the two, but a larger sensor can provide the benefit of gathering more light and using lower ISO. But, again, my use is above water. 2. I am not sure of which 50 2.8 macro you are talking about. The one for full frame is horribly slow w/autofocus and essentially useless underwater for my needs. So I went to the 90 2.8 and am happy. I have not used the Tuit 50 2.8 for apsc, but I hear it is better at autofocus than the full frame 50 2.8. In any case, I would avoid the full frame 50 2.8 for UW use. 3. The extra dials on the full frame are nice, but not always necessary. Its plenty easy to change settings on the a6500. Given my experience UW, I would suggest the a6500. I would prefer the smaller housing and less expensive lenses, which might allow you to get some extra gear for UW shooting. The a6500 also might get cheaper once they release its replacement, which is rumored to be coming out in the next year or less. Plus, you could find a used a6500 for sale and save money that way. Hope this helps, just one person's opinion though.
  4. Thanks for the information Pedrosana. I appreciate it and will check into it.
  5. Pedrosana Sorry, I don't know how to post a photo or else I could show you? It is a combination of the dummy battery, which then has a wire running out of it that attaches to something that looks like this: I think this was basically a one-off they made for me at Reef Photo. I tried the standard Nauticam battery pack that you show, but it plugs into the micro-usb, and I need that port for remote shooting. So I couldn't use that battery pack. They clearly rewired the dummy battery to something that resembles the image above, which holds two 18650 batteries. Sounds like you could probably do that on your own. I am slowly learning about the electronics, so hopefully I can make my own next time. In any case, if I can figure out how to post a photo I can show you. I feel for you on the battery issue. I moved to Sony from a big ole' Canon 5d Mark II that I had used for several years uw. I loved the battery life. But the Sony is smaller and since I work in freshwater streams, where I need to walk up and down the river carrying the housing, smaller is always better if the image quality is the same. And, since I use my camera remotely for skittish fish, I can't simply pull it out of the water and replace the battery every hour. Mostly because it takes the fish about 30 mins or so to calm down after the camera is in place, which means relying on the traditional single battery would leave me with only 20-30 mins of shooting. Thankfully this has solved the issue, though I would still love any solution that allows me and the camera to remain UW for the longest period. Hopefully this helps. One thing, you clearly know more about the electronics than I do, so forgive me if I don't explain everything properly.
  6. This is an interesting topic. I have a Sony A7RII w/Nauticam housing. I wanted to use it to shoot remotely, with camera in water and me on shore. I shoot in freshwater rivers. The problem as everyone knows. The battery life is crap on Sony. Adding an extra battery source was not easy. You can get the extra battery pack that Nauticam makes, but it plugs into the micro-USB. I needed that port to tether my camera on shore so I could see and shoot remotely. Thankfully, Reef Photo did a great job and engineered a solution where I use two 18650 batteries and plug them into a dummy battery that goes up into the original battery port. It essentially triples the battery life for me underwater. I was getting an hour or so with my Sony battery. I get around 2-3.5 hours with the two 18650 batteries, depending on water temperature and the amount of video/photos I take. Sounds like you know far more about electronics than I do. I don't know if they make dummy batteries for your cameras. I just wanted to share this to let you know it is possible to engineer a solution. Hope it goes well for you.
  7. Ricardo Good point on the led flash w/battery. I like it. I would rather use fiber optic for simplicity. Take care
  8. Hellhole Correct. In fact, I did not see the original hot shoe connector but they made one that was slim so that you could also fit the battery pack into the space above the camera. I think it may have cost 75$ or something to modify, it was not that much. Someone with more electrical skills than I could easily do it themselves. I hope this helps. J
  9. Correct Ricardo. I am using that battery pack. You are right, there is not enough room for fiber optic trigger. Instead, I use a sync cord through one of the caps on top. I still have a vacuum valve and another cap that I use for a remote trigger. But the battery system is great. I tried yesterday to measure the difference in battery life with my Canon 5d markIII. The battery pack with Sony a7RII runs about 75% of the length of my Canon 5d markiii. So not quite as long, but certainly 3 hours or more and that is plenty for me. I then open up the housing and drop in another battery pack that is already charged. All that said, you will need a thin hot shoe to make it work. A standard one if too thick. But Reef Photo constructed one for me that was great. Hope this helps You can use the sync cable with the battery but you need a thin hotshoe. Reef Photo made one for me that worked very well.
  10. I use the battery pack with hard wired strobes, no problem, and my battery life is equal to my Canon 5d mark III. No issues there for me at this point. The battery pack works well. I do all of my underwater work in streams and I agree, opening the housing sucks. But, it is worth the tradeoff in size and mobility for me to have a smaller housing and setup. I am sure that is not the case for everyone though.
  11. Hi. I have the camera and a Nauticam housing. I moved over to the camera from a Canon 5d Mark III. The autofocus is not quite as fast, but that is not a big issue for me. I can't say anything about the D810 because I have never used it. The battery life is shorter than the Canon. However, this is remedied by purchasing the extra battery pack that Nauticam makes. Extends battery life to the point where it is basically equal with the Canon. So that is no longer a concern. Lastly, the housing is smaller and lighter. That is a big deal to me. I love the camera for underwater work. But I have also decided to move forward with mirrorless. Hope this helps
  12. Interesting. I had the same issue with my Ikelite and my Canon 5d Mark II. Buttons would jam, the back dial would not work consistently and I had to jimmy rig a solution. I put up with it for a few years then sold it.
  13. Thanks! I am interested. What brand are the arms/clamps if you don't mind me asking? I will shoot you a pm. Appreciate it.
  14. Hi, I am new to the site, but I have recently purchased a couple items from members here and am now looking for two other products. Specifically, I am trying to find 3 used/new 1" clamps and two double ball arms, one 5-6" long and another 11-13" in length. I could probably make do with two 8" arms. In any case, I had one set of arms and a strobe stolen recently so I need to restock my supply. Thanks for any help you can provide. John
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