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All laser pointer are bad, especially for imagers. If you have ever had some well meaning idiot 'accidently' wave a laser past the front of your scope while your observing you will know why they are dangerous. It was bad to see a so-called expert using a laser pointer during the ABC Stargazing Live show last night, when someone was observing right through the light path.
They can only be justified as a knowledge sharing device, when at a dark site and no one is at a scope or imaging.
And of course, in any sort of urban environment they will have the police knocking at your door.
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