Focusable Borescopes

Most borescopes have a fixed focus. Only selective borescopes have either manual focus or autofocus features:

Two types of focusable borescopes:

• Rigid focusable borescopes / microscopes
• Flexible focusable borescopes / microscopes

Diameters of the focusable borescopes:

• Small diameter 3.9mm / 0.15"; Model: FC-3920plus
• 4mm / 0.16" diameter: Models PM-40, GB-430, GB-460 rigid
• 7mm / 0.28" diameter: Models PM-70S, PM-70
• 7.5mm / 0.3" diameter: Model GB-7547
• 8mm / 0.3" diameter: Model FC-852plus
• 14mm / 0.55" diameter: Model FC-14530 autofocus