I am thinking about installing a peep hole in the RV door of my trailer. The door is 1.5 inches thick.
I notice that peep holes come with varying view angle options, like 160, 200, and 220 degrees, and with or without an inside privacy cover that swings open and closed.
The ones so far I have seen show a shaft diameter of 1/2 inch and length of 1 3/8 inches to 2 1/6 inches. I am not sure if that means that I would have only 1/8 inch of useable thread left for installation, which could be problematic. I would hate to drill a 1/2 inch hole in the RV door and then not be able to use the peep hole.
The satin colored brass ones are relatively inexpensive, ranging from, say, $6 to $20.
I have no experience with peep holes. Does anybody have experience with a peep hole and, if so:
What angle view do you prefer and why?
Are the cheap ones junk?
Any issues with clarity and/or viewing distance issues?
Is the viewing cover a significant benefit (I would not want sunlight to shine into the trailer)?
Thanks for your help.