For comparison purposes of other products, this is a cylinder image on a Snap-On BK-5500 inspection camera. This is a cell phone pic that I took of the Snap-On screen image. It's a '08 Hemi dropped valve seat. I use the camera a lot for brake inspections. Used ones can be had for around $100 on ebay and these cameras are extremely durable. It's 10 yeqrs old, I'm sure newer models have better quality but this one does it's job well.
