The sensor size of the camera connected to the borescope affects the extent of blurring. Conversely, it approaches the image seen directly by the eye.

The focal length (f-value) of the adapter lens also varies.

Confirmation was conducted using a φ4mm 0° borescope.

■ When using an 18mm focal length adapter lens:

(1) With a camera featuring a 1/1.8-inch imaging sensor:

 

 

 

 

(2) With a camera featuring a 1/2.5-inch imaging sensor:

 

 

 

■ When using a 35mm focal length adapter lens:

 

(1) With a camera featuring a 1/1.8-inch imaging sensor:

 

 

 

 

(2) With a camera featuring a 1/2.5-inch imaging sensor: