
Close focus matters more than the pixel count
A clear view of a piston, casting or fastener starts with working distance. Here is how to read the image claims before choosing a camera.
Spark-plug access, cylinder walls, intake bends and hard-to-see components. Start with the actual route to the target.

A clear view of a piston, casting or fastener starts with working distance. Here is how to read the image claims before choosing a camera.

A sideways view and a steerable camera solve different problems. Neither feature guarantees a route around an obstruction.

Separate the entrance, the route and the final viewing position before buying a borescope for engine inspection.
Opening size. Working distance. The route in.
Build a shortlist around your inspection.