Milwaukee is very clear. Used by many plumbers. I have seen them in person look inside pipe for clogged drains. Real clear pics.
Not sure how expensive they are though.
So heres a pic of in side a motor and my smoker. It looks like it likes close up to a.good image. And all light was provided by the camera.
Yup and that kit comes with a screw on mirror for looking around corner too if that helps