Extension Tube Work Distance

The values in the tables below are for the camera lens kit of EPSON under LED lights. When the environment is different or using other cameras, values are different. The WD and FOV may change according to the individual variability.
Tip: Rough calculation methods are described in Appendix C.
You can select proper camera, lens, and extension tube from FOV and WD by using Optical Selection Tool.
(Epson RC+ installation folder\Tools\CamSelectTool\CamSelectTool.exe)
For combinations which do not described in this manual, select by using Optical Selection Tool.

Megapixel Camera Lens

Unit: mm

Extension Tubes	Lens Focal Length
	f = 8 mm	f = 12 mm	f = 16 mm	f = 25 mm	f = 50 mm
0.0 mm	100 to 1500	150 to 1500	300 to 1500	300 to 1500	500 to 1500
0.5 mm	65 to 210	110 to 290	200 to 700	260 to 1500	480 to 1500
1.0 mm	35 to 65	70 to 140	140 to 260	210 to 680	440 to 1500
1.5 mm	25 to 40	50 to 85	100 to 160	180 to 430	400 to 1500
5.0 mm	-	-	30 to 35	80 to 110	265 to 490
10.0 mm	-	-	-	40 to 50	185 to 260
15.0 mm	-	-	-	25 to 30	145 to 180
20.0 mm	-	-	-	-	120 to 140
40.0 mm	-	-	-	-	75 to 80