Lives in United States USA, OR, United States
Works as a Retired
Joined on Jan 17, 2012
About me:

Hobbies: Amateur astronomer since 1962, astrophotography, gardening, kayaking, ham radio
Born: 1946


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In reply to:

NancyP: What is the maximal load the home-made barn-door mount can accommodate?

What is the minimal wattage on the green laser? I understand that these green lasers often emit eye-cooking infrared, and would like to use the least powerful laser that can be used for polar alignment. I know some people use more powerful lasers for group lectures during star parties, but that capability I don't want.

Hi Nancy,
I don't know the minimum wattage, since that would depend on circumstances. The visibility of the laser beam depends not only on its wattage, but also on the amount of particulate matter in the air available to reflect the laser beam. I purchased my Laser from Orion Telescopes for around $40 US PPD. It's rated at <5mW, which seems to be very bright in a dark sky. One important use consideration is to be very sure not to point the laser beam at anyone's eyes or at any aircraft. To do otherwise would risk eye injury and would be violation of the law.

Best Regards,

Direct link | Posted on Mar 25, 2013 at 05:42 UTC
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