Photographer Rui Nelson Silva came up with this simple plate and bolt solution for a bottom-attached camera strap.
It is based around a small aluminum plate that you can make if you have the skill or buy a similar one at your local hardware store.
From left to right has showed in the photo
- 1/4” bolt
- 1/4” washer
- Recovered aluminium part
- 1,5mm thick aluminium plate (dimensions on CAD image)
- Rubber washer
Well, parts 1, 2 and 5 are basically self explanatory, but the recovered aluminium part is in fact different, this piece was basically recovered from a broken household appliance, but it can be easily replicated with a washer of the size of the big diameter and a small one that looks like a small ring.
In my point of view, taking a printed image to a hardware store is always the best way to go, because you can compare it with existing materials or simply ask to the employee of the section, what he have available that matches the things you want.
The aluminium plate, can be done in many ways but due the amount of holes, my advice is to simply go to for example to an aluminium window maker and ask for tinny bit of square tube from is on scrap and them do the holes first and finally cut it out with a small saw. (Carefully cutting and patience will be necessary)
Be careful to eliminate every sharp edge or your strap will be damage and your camera might fall. Then just put the pieces by the correct order, and put your camera strap on.