Hi guys,,
I made a hands free view finder a few years ago while dredging.
In the short of it i used a plastic 10 liter paint bucket,cut the lid centre out leaving the rim.
I then replaced the removed plastic with clear perpexs that was screw and silconed in place.
The bottom of the bucket is removed and then I fixed an old arch welding helmet less the face sheild.
You now have a bucket with a clear bottom on your swead that can be lifted up and down just as a welding helmet does,
The setup allows you to work hands free while having a clear veiw at the bussiness end.
Cheers
Steve