It has since occurred to me that perhaps green is more dangerous because our eyes are more sensitive to green light, given the same power/wattage. -----Original Message----- From: Don J. Colton [mailto:djcolton@piol.com] Sent: Monday, August 11, 2003 12:47 PM To: Visit http://www.utahastronomy.com for the photo gallery. Subject: RE: [Utah-astronomy] Green laser backlash Eye damage can occur with green lasers. They are more dangerous than red ones. I read about an amateur astronomer causing some problems with a friend's eye when he was trying to collimate a scope with a green laser. You eye's involuntary closing should help some but it isn't 100 percent effective. Clear Skies Don Colton -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com]On Behalf Of Kim Hyatt Sent: Monday, August 11, 2003 11:00 AM To: 'Visit http://www.utahastronomy.com for the photo gallery.' Subject: RE: [Utah-astronomy] Green laser backlash Regarding sources, I can't help much. I paid too much for my green laser at RTMC, but it has built-in red and white LED lights, as well, so the cost was offset somewhat. It was a bit of a compulsive purchase, I must admit. I also wonder about eye damage. Since the maximum output is supposedly the same as for red lights (5ma) how would a green laser be any worse than the red? -----Original Message----- From: Lambert, Aaron [mailto:Aaron.Lambert@Williams.com] Sent: Monday, August 11, 2003 10:55 AM To: Visit http://www.utahastronomy.com for the photo gallery. Subject: RE: [Utah-astronomy] Green laser backlash Hello all, Just delurking here for a moment... For those of you who own green lasers already, where have found the best place to purchase them are? The best price I have seen is EBay for around $70. I always wonder about the quality, etc of EBay items that are mass-sold, though. I have considered buying one so it is easier to point out constellations for my kids (ages <= 6) and for youth groups (ages between 12 and 18). Pointing with my finger works pretty well for showing one or two people, but I have tried that while camping with a group of 10+ and they cannot all follow my arm and finger very well. Also, I understand that they are fairly dangerous in that they can cause severe eye damage if the beam hits someone in the eye. Is this true? Obviously I wouldn't intentionally let a kid (old or young) get a hold of one, but I remember being fairly curious and resourceful as a teenager... :) Anyway, I would appreciate any comments or insights from the group. Thanks, Aaron Lambert _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy