Completed filter holder V1.....
It's far more compact than anything else I've seen that fits anything other than a naked iPhone, which is important because if my phone is a huge rig then I may as well be using a "real camera" and if I can't fit the whole thing in my pocket then that means carrying a bag and (once again) I may as well be bringing a real camera.
I cut up some 2mm aluminium sheet to bridge the gap between the two sections of the Tiffen and epoxied it in place.
Then I added another layer of 0.22mm aluminium that was painted black (that I ordered by mistake - thinking it was 2mm) to cover it up and give it a semi-nice finish. I did a bit of filing around the edges and added some black nail polish to tidy up the edges, and finally put a pop-socket holder on it so I can hold it a bit more securely.
This is how I typically hold my phone when shooting, it's nice and stable and it gives me a good grip.
The case is super grippy, so I'm optimistic that it'll work well.
I deliberately called it Version 1, because after discovering how easy it was making this one I'm thinking that version two should be a custom one designed from the ground up. After all I have all the tools and plenty of spare materials. I'm thinking I might have a ring of rare earth magnets set into the sheet, and I'll base it on a step down ring that's stepping down from a few sizes above so it's got a bit of material in it. Hopefully I can create something that attaches really well and is still nice and slim.