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I don't know what lenses you use, but I use the 15mm dia, 15mm FL PCX lenses and they fit great on the inside of Speedo or Arena goggles, giving me clear wide vision.... I am really having huge problems to find swimming goggles, that offer enough space for the lenses to be mounted inside...
Additionally to this I ve had a different idea which I d like to share: I will get a form of my face (with plasters) and then fill the form up with cast, so I have a more or less exact copy of my face.
Anyone has an idea what else I could use as material for the mask/frame?
@Tarzan: Which lenses did you buy, what's the Focal Length?
They all work the same in air, but under water the FL differs.
Use the 15mm for fitting between eye and goggles
<) )| --> eye - lens (in ring) - goggle
use the 20mm for sticking on the outside of the goggles
<) |) --> eye - goggle - lens (glued on)
Use a ring or a plastic tube and your imagination to fit them on the inside.
I never cut a hole in my goggles and I don't intend to.
I have noticed this style used by Freedive Dahab instructor Linda, and also Mike Board of the UK. The advantage, I gather, is that the leneses are held in the same plane. I tried the Trygons version, also held in plane, and could not see a thing.I'm thinking about using an aqua sphere seal pair of goggles (sphera without the nose) as my donor, as I have one I do not need for pool (aqua sphere Kaiman goggles are AWESOME for pool work and actually fit / seal on my face) and I could affix the corrective lenses on the outside and drill 4 holes in the corners of the plastic lenses to let water in.
If I screw it up, replacement sphera lenses are easily / readily / cheaply available.
Just a thought / option. The seal is easy to affix in the same location every time, thus more consistent vision.