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jonjake last won the day on February 9 2017

jonjake had the most liked content!

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About jonjake

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  • Birthday May 25

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  • Location
    San Francisco, CA

Additional Info

  • Show Country Flag:
    United States
  • Camera Model & Brand
    Nikon D850
  • Camera Housing
    Nauticam NA-D850
  • Strobe/Lighting Model & Brand
    Inon Z240s, Backscatter MF-1/OS-1, Kraken Lights
  • Accessories
    Kraken diopters

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  1. I have 2 Inon Z-240s that are in various states that I no longer use. Perhaps someone could find them (or their parts useful). One of them still fires just fine but the tubes are fairly brown and from what I remember the light output is somewhat affected by this. The other does not not fire but the capacitors do make a charging sound at when the are turned on. Taking a look inside it looks like it most likely flooded at some point. Also the back battery cap is taken apart. I think it is likely someone electrically inclined and motived could combine the front flash tube assembly from this dead unit with the electronics from the unit that fires and have a basically new Z-240 Type 4 strobe. Both have -0.5 stop diffusers and 1 has a Inon ball mount. Make me an offer or convince me you will put them to good use (and pay the shipping/handling).
  2. I am looking for old housing that uses Nauticam N120 style ports for a project. I don't really care what camera model it is for, just that it uses N120 ports and has a few threaded bulkheads. Ideally would find something that has been otherwise rendered useless for a couple $100 bucks.
  3. I would prefer to sell it all together but if I don't get any offers for the entire setup I might consider selling the legs only. Jon
  4. Brand-new XIT 404 Tripod Base (for Nauticam) & Twist-Clamp Legs (3). All brand new in original packaging, never been in the water. I bought it thinking I would start shooting video underwater and still haven't a year later so its time to go to someone who will use it. MSRP: $725, asking $600 OBO.
  5. Inon Z240 Type 4 strobe in good condition. $350 plus shipping. Will include -0.5 stop diffuser, Nauticam ball mount, extra o-rings, & modeling light diffusers. Strobe has never been flooded and battery contacts are still shiny. Shipping from California.
  6. I agree with all the points made above. The centered modeling light of the Retra Prime/Pro makes usability of the Retra snoot greater, the offset when using the Inon can be challenging. I am happy to have the wide uniform light for wide angle photography. In the few times I have shot wide angle with the Retra Pros so far I have been happy with them. They also certainly will work for shooting macro I will just need some adjustments to how I shoot macro (most likely higher ISOs). The takeaway worth sharing is that while wide uniform light might be ideal for wide angle shooting it has potential downsides for macro shooting, specifically when using a snoot. In retrospect it makes sense from a physics standpoint but it was obvious to me it would be an issue until discovering it in the water.
  7. Ok I just converted my LSD snoot back to the Inon Z240 mount and re-ran this test. To me it definitely looks like the fall off is less significant as the masks are inserted with the Inon. I found that with the same exposure (f/22, 1/250 sec, ISO 160) the Inon was set to GN8 (2 clicks below full GN11) for the exposure to look right to me, albeit the Inon Z-240 is supposedly a much lower power strobe. Inon Z-240 @ GN8, no mask Inon Z-240 @ GN8, 1st circle mask (largest) https://photos.smugmug.com/Retra-Test-Shots/i-G4LrgLr/0/5370afbe/X3/InonZ240_1st_circle_mask-X3.jpg Inon Z-240 @ GN8, 2nd circle mask (2nd largest) https://photos.smugmug.com/Retra-Test-Shots/i-9VQ3k94/0/17d49964/X3/InonZ240_2nd_circle_mask-X3.jpg Inon Z-240 @ GN8, 3rd circle mask (3rd largest) https://photos.smugmug.com/Retra-Test-Shots/i-3KWRfHN/0/5edea501/X3/InonZ240_3rd_circle_mask-X3.jpg Inon Z-240 @ GN8, 4th circle mask (4th largest) https://photos.smugmug.com/Retra-Test-Shots/i-GCc5fTs/0/7d732bbf/X3/InonZ240_4th_circle_mask-X3.jpg Inon Z-240 @ GN8, 5th circle mask (5th largest) https://photos.smugmug.com/Retra-Test-Shots/i-gCFz2PT/0/3bfb1ab4/X3/InonZ240_5th_circle_mask-X3.jpg Inon Z-240 @ GN8, 6th circle mask (smallest) https://photos.smugmug.com/Retra-Test-Shots/i-xwsnt7w/0/192e54f5/X3/InonZ240_6th_circle_mask-X3.jpg I would say comparing this set of images with the different mask sizes also supports my memory of not having to make as significant of power changes when moving through different mask apertures on a given mask card (1-3 or 4-6). We know the Retra Pro has a very wide and even field of light which is not the case with the Inon Z-240. However when using the Retra snoot that seems to be a pretty significant disadvantage as far as how much of that light is collimated and transmitted by the snoot. I primarily bought the Retra Pros for wide angle but it is a disappointing to find out the Retra snoot isnt as powerful on the new "high-power" strobes as my old Inon strobes. I guess its good I have other options for snooting...
  8. I ran some initial bench tests this afternoon to reproduce what surprised me in the water yesterday as I hadn't noticed it when previously using my LSD snoot with a Inon Z-240 strobe. It makes sense that the amount of light getting through would fall off as the aperture is stopped down (by using the masks). Perhaps more of the light emitted from the Inon strobes makes it through the snoot or perhapsmy memory is just wrong. All of the images below were shot with a Nikon D850 and Nikon 60mm Macro lens on the bench. I set the exposure to "reasonable" macro exposure settings, f/22, 1/250 sec, ISO 160. Starting without a mask in the Retra I then set the strobe power to expose this shot how I typically would, which put the dial at 50 (+2), just 2 clicks from full power. Without changing exposure or strobe power I then proceeded through all the standard circular masks (2 sliders). I guess having to start with such high strobe power on the Retra Pros for the snoot (even without a mask) was the biggest surprise for me. The 3rd largest mask hole looks to be around -2EV darker (in Lightroom) than no-mask meaning to achieve my preferred exposure I would need push the strobe up to full power and ISO to 320. Guess I will just have to start shooting higher ISOs that I am used to for macro when using this setup. And probably wont even bring the mask with smaller holes when I dive. Hopefully this realization I have come to is helpful for others, my apologies if this is obvious. No Mask in Retra Snoot: 1st Circular Mask (largest): 2nd Circular Mask (2nd largest): 3rd Circular Mask (3rd largest): 4th Circular Mask (4th largest): 5th Circular Mask (5th largest): 6th Circular Mask (6th largest):
  9. I was primarily using the various apertures on the larger of the standard circular masks. I just double checked the mounting module and I'm fairly sure its the correct one, it measures just under 43 mm from the front to the back of the bayonet component (see attached image). I also found the box it came in that says "Mounting module (Retra Flash Prime/PRO)". I will set up some controlled bench tests for playing with things to see if the results are similar to what I was experiencing underwater.
  10. I have shot my Retra Pros a handful of times in Monterey, CA recently (both wide and macro) and have mostly been happy with the amount of light and quality of light that comes from them. I shot macro this last weekend and used my Retra LSD snoot with the Retra adapter and was surprised at how high of power I needed to use to light my subject. I used the LSD snoot for years with a Inon Z-240 strobe and typically remember being around 3/4 power for a common macro exposure f/22, 1/250, ISO 200 on full frame. With similar exposure settings I was noticing myself at or a few clicks under full power on the Retra Pro with the LSD snoot yesterday which was a little surprising to me given the power of the flashes. I suppose it is possible that really wide even light from the circular flash tube is very inefficiently transferred into the snoot. Has anyone else noticed this?
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