What is the difference between auto-focus, fixed-focus, & manual-focus probes?Updated 10 months ago
Teslong’s fixed focus probes are ideal for tight-access applications because they are so small in diameter - down to 0.153-inch (3.9mm) The majority of the probes that we make for general inspection purposes, including our articulating inspection cameras, are fixed focus.
Teslong’s auto-focus lenses are larger in diameter - ½-inch (12.5mm), but the larger size gives them the benefit of an auto-focus system similar to one found in your mobile phone device. Fixed-focus lenses are optimized for focusing on objects that are ½ to 2-inches away, whereas the auto-focus lenses can focus on anything from ½ inch to 100 feet or even more.
As for manual focus lenses, something like a manual camera lens, the only borescope that we make with that feature is the new NTG200H Focus & Fold borescope for rifle barrel inspections. Although this is a manual focus design, it is still optimized for up-close viewing with a focal range of 1/2 to 2 inches. This device is much easier to focus than previous models, but it really is optimized for gun inspections and not recommended for other applications.