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Posts posted by gradient

  1. 31 minutes ago, divengolf said:

    Interesting discussion. I take a different approach to achieving neutral buoyancy. I've built a small frame out of 1/4" polycarbonate that I attach to the bottom of the housing via the 1/4" female thread. Then I attach links of 2 " PVC pipe capped on both ends to the frame using tie wraps. This allows me to adjust the buoyancy by changing the length/number of the PVC pipes. I fine tune the rig to get about 1/2 # negative in fresh water at home which is about neutral in salt water.

    The major advantages are that it's easy to make buoyancy changes when needed and that nothing gets in my sight line. The major disadvantage is that it adds about 3 inches to the bottom of the housing, so getting down into the sand is sometimes a bit of a challenge. I use this set up mainly for macro as I remove two 14 " buoyancy arms from my strokes when I go from dome port to flat port.

    Another advantage is that it's real cheap. I have less than $10 USD in the setup.

    Just another approach.

    hey thanks for the reply! Would you mind sharing a picture of that setup? I have looked into doing some DIY work to achieve neutral buoyancy too. I think doing it yourself saves money, but more importantly allows you to have full flexibility just by using simple home hardware materials. 

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  2. Thank you gents. Depending on the application, I might just end up buying and trying both setups. I like Tim's as I think this would add a bit of a trimming effect on the rig, as it also feels a little bit pointing upwards by the port side due to the port float. I like to have the INON's though, they're currently 30% off at blue water photo :) 


  3. Hello fam,

    Thought I'd share my rig with you and get some advise on how to make this beast neutrally bouyant. I have ran out of options on how to get it as close to neutral as possible. I only used Stix floats and these were the results:

    Note they were weighed in freshwater (bathtub setup).


    Rig for Macro:

    -Subal ND700 , D700 with Nikkor 105VR 2.8

    -Subal FP-FC105VR macro port with custom Stix float

    -2x YS-D2 with neoprene jackets

    -2x 8 inch ULCS arms with 3x jumbo stix floats on each arm

    -2x 5 inch ULCS arms with 1x jumbo stix floats on each arm

    -2x sync cables

    -7x clamps

    -L&M Sola 800 for focus

    -Macromate (By Backscatter) for supermacro


    Weight underwater: -1.06 lbs


    I'd like to get this to at least close to neutral however with 1.06 lbs to go, I don't have space to put on floats anymore. Or do I just do DIY rought and zip tie floats onto the arms?

    Without the Macromate I got it down to -0.67 lbs tho. Would this be already neutral in saltwater?

    Any suggestions would be appteciated. Thanks!



  4. This is a photo taken with my Nikon D700 with a sigma 15mm fisheye lens, Dual YS-D2 strobes, F6.3 at ISO 200, Shutter at 1/60.

    Let me know what you guys think of this. I was close to my subject (less than 1 foot away) and my strobes were already pointed outward and were about ~15 inches away from my DP-230 Zen dome but I can still see some backscatter. How would you reduce backscatter in this case? I also notice some glare on the sides of the picture implying that my strobe beams hit the sides of my dome. Any advise from you guys would be extremely helpful. thanks!


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