I have to look at the walls of a 20mm hole and I need to find really small cameras so I can look at all sides at once.
I guess this caught my eye…
But it might be the LED on the wires and the camera in the key body? (Well spotted Liam @ core)
Welcome to the forum, very sorry for the delay in getting back to you!
To get into such a tight spot I’d be taking a look at an endoscope + lense combo (something like this might work?: 3 in 1 Camera Lens Set | Core Electronics Australia)
There might be other conical lenses that throw the light out to the sides although I wouldnt even know where to find something like that!
A camera shop might be able to get you pointed in the right direction Re: the lenses and an idea as to where you might be able to find something so small
Ebay has plenty of hits if you look for endoscope. For less than $20, might be worth a gamble.