Hmmmm, mixed reviews. Thanks for the replies.
I've tried using a small LED flash light with a flexible neck and it works OK for the first couple of inches of the barrel.
I've ordered a "Thill fish light battery" that has a pull-on, push-off light in the end. I'll pick it up in the store Saturday. I'm sure it will work better than the flashlight but, I'd like a closer look at the barrel down deep.
Looking at those available on Amazon, I've found some with a focal length of about 1.5 inches instead of 2 to 6 inches. Prices are right so, I guess it depends on the brand. Some offer HD quality picture.
I've also seen some that are WiFi or blue tooth compatible which could solve the compatibility issue with some devices.
For the price, it's hard to wrong ...and if I don't like it, I can return it.
Still shopping .... There are a BUNCH of different brands and models.
If I decide to buy one, I'll report my experience here.
Thanks again.