You're planning on using a 300mW red laser as a pointer? Also, by unfocused, do you mean without a second collimating lens to focus the laser, or without the primary collimating lens that tightens the beam?
You're planning on using a 300mW red laser as a pointer? Also, by unfocused, do you mean without a second collimating lens to focus the laser, or without the primary collimating lens that tightens the beam?