I bought this one:
ViVidia AbleScope VA-400 USB Rigid Borescope
[pic inserted in case link goes dead]
Darn, these Amazon links are ugly…
A working Amazon link ends with the 8-character product reference e.g.
Everything after that is nonsense, or possibly an Amazon Associate link for commission to whoever owns the website where you found it.
Speaking of borescopes, I have bought one Amazon one which was about €300, with its own LCD, and it is completely useless for engine inspection – basically because it is not capable of illuminating the surface being examined. It was OK for checking the internals of the TB20 elevator for the corrosion SB/AD. I am very impressed with the above photo of the valve. I could not get anything remotely as good with mine.
Thats what schocked us the most on the first test of this boroscope. We thought the pictures were taken on cylinders that was removed and sunshine shinning through the bore.
Can anyone recommend a borescope / boroscope / endoscope which actually works, not just in daylight but also using its built-in illumination?
Over a year ago I bought a 200 quid one on Amazon (a pretend-German company which was actually a chinese outfit called Topbestsource Technology Ltd) which proved to be completely useless. It kind of worked but if you turned on its internal light, you could not see anything. And most of the time you do need the illuminator feature.
A friend works on Airbuses and the ones they use cost 10k, but they do work.
I need it for stuff like checking cylinders (so need a 90 degree mirror) and checking the TB elevator for corrosion.
How about the one mentioned in this thread?
Being rigid, I am not sure it will be any good for either of those two uses, but as always I am willing to be educated 
I did a search beforehand and found multiple threads.
I have the one mentioned above : ViVidia AbleScope VA-400 USB Rigid Borescope Endoscope with 180 Degree Articulating 8.5mm Diameter Probe
It’s perfect for the job: has good light, the head can look back at the valves, easy to use and takes videos as well as photos. For about $150 it’s the best bang for the buck out there.
Another vote for the Ablescope VA-400 USB. I got mine last week and its really good.
and another one – Cam this time
