The Nauticam collar has the lens still rather negative. I'm considering using either the BTS Flat Port collar (no buoyancy specs) or Stixs 12 segment collar.

I'd like to get the lens as close to perfectly neutral as possible.

I've been experimenting with 3D printed buoyancy solutions for a while now. I've created a few iterations of a form fitting collar that snuggly fit over a 105mm macro port and add about 250 to 350 grams of buoyancy. It's a lot cleaner looking than a foam belt too. My first versions relied on painting with epoxy resin to seal it, but I've since been able to make versions without added sealants that stay watertight to 100feet over multiple dives. I want to keep iterating to reduce the dry weight and wall thickness a bit more before sharing. I've made prototypes for the Port60, Port87, and Port60+20mm extension. These have been especially useful to counter the added front weighting of a Dual Flip adapter with a couple of diopters attached.

It should be very possible to design one of these for the WWL-1. I have a WWL-C, but it includes a built-in aluminum buoyancy collar.

If @Dave_Hicks can make you one, I’d be inclined to go there. I just use the 1st version foam collar, and Stix floats on my arms (I have really skinny arms). Another thing that looks interesting is Marelux’s adjustable float bag:

Marelux

Flexibuoy

Flexibuoy

cheers.

Craig

35 minutes ago, humu9679 said:

If @Dave_Hicks can make you one, I’d be inclined to go there. I just use the 1st version foam collar, and Stix floats on my arms (I have really skinny arms). Another thing that looks interesting is Marelux’s adjustable float bag:

Marelux

Flexibuoy

Flexibuoy

cheers.

Craig

The port floats are big jobs, about 12 hours prints and use 1/3 of a KG spool. But once tested out, they are pretty easy to reproduce. So far, I just have designs for the 3 macro port configs I listed. I don't have a WWL-1 to measure.

I have been looking around at various foam options to make a float for my rig, a lot of places have the foam used for insulation under house slabs which is specified as high density and low water absorption and densities in the range of 30-33kg/m3. This means it has a buoyancy of about 970 kg/m3 or 0.97 gr/cm3.

According to the page for the original WWL-1 float collar the lens is 160 gr negative UW with the collar. so it would need about 160/0.97 = 165 cm3 of 30kg/m3 foam. This is a cube about 5.5 cm or 2.1" on a side. If you can source some of this foam you could carve out a piece in the shape of an arc matched to the OD of float collar about 20cm long x 4cm wide and 2 cm thick and glue/screw it to the float collar you already have. With a bit of searching you could probably find a piece of the foam at an art supply place - it's used for sculpture, you would look for XPS foam with a density of 30-35 kg/m3.

So I don't currently have the float collar. Looking at specs the lens seems to be about 600g negative without it which would be a rather significant print.

The Stix 12 section collar should do it with some customizing, unfortunately expensive to get in Canada with the current tariff situation .

7 minutes ago, Grantmac said:

So I don't currently have the float collar. Looking at specs the lens seems to be about 600g negative without it which would be a rather significant print.

The Stix 12 section collar should do it with some customizing, unfortunately expensive to get in Canada with the current tariff situation .

You could also carve a whole float collar out of such material if you have the dimensions, just do the volume calculations if you know the foam density. It would need a steady hand with a hot wire cutter to make it neat though.

Mozaik still list the buoyancy collar for WWL-1 for $92CAD and they ship out of Vancouver. You could also check them for the Stix collar. they seem to have a coupon code for 12% off - no tariffs.

If you used the Nauticam buoyancy collar and assuming you are shooting stills not video you could take that weight into account with float arms

3 hours ago, Dave_Hicks said:

The port floats are big jobs, about 12 hours prints and use 1/3 of a KG spool. But once tested out, they are pretty easy to reproduce. So far, I just have designs for the 3 macro port configs I listed. I don't have a WWL-1 to measure.

No doubt it’s a big job. But if anyone can do it, you da man Dave.