If there is not a quite nice method for users to get clear enough line targeting in distance, I would just recommend users proper line measuring tool such as a Berlinlasers blue line laser alignment. It is a nice line measuring tool, which is keeping direct blue laser beam emission from 445nm blue laser diode, owing to its nice metal heat sink cooling system and APC driving circuit board design, it is just able to obtain highly stable blue reference line targeting easily. Within 8 to 10 hours a day continuous line targeting work, blue laser alignment gets stable performance, and keeping at least 80% laser beam stability in long term line alignment use.
Owing to the good use of qualified glass coated lens, blue line laser alignment is just keeping super high linear quality and clearly visible blue reference line targeting in long term use. It is not adjustable focus, however, users can also make free screw of laser beam aperture part to make free adjustment of blue line thickness. Users can make correct choices of output power and optic lens degree, and then obtain high accuracy line aligning result precisely and accurately.