Re: Yet another noob question


"justbeats" <steve_beats@xxxxxxxxxxx> wrote in message
news:1125925987.566392.62220@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Yes, a bigger scope will gather more light pollution too. But I think
> it's more accurate to say that it's the objects in the sky that are
> susceptible to light pollution, not any particular brand or size of
> scope (I'm sure there will be dissenting views :-)
>
> Given that you want to see things clearer/bigger, go ahead and get a
> bigger scope. For a given amount of light pollution, the big scope WILL
> reveal more detail than a smaller one.
>
> There are various brands of LP filters available too. They cut the
> total amount of light getting to the eye - but mostly at polluting
> wavelengths (e.g. sodium emission). They work best (visually) when the
> eye is well dark adapted.
>
> Which leads me to point out that what I've just said refers to general
> light pollution painted across the sky; the orange glow. Your posting
> implies you're more affected by local light pollution, the glare from
> the street lamps. Providing you're not pointing in their general
> direction, and providing your scope is properly baffled and blacked etc
> - they will have little or no effect on the scope's performance
> (whatever it's size). They WILL have a detrimental effect on your
> ability to dark adapt and that will limit visual detail you can see and
> reduce the efficacy of a light pollution filter (again this is nothing
> to do with the scope - and a big scope will be "better" than a small
> one).
>
> There are many ways to counteract streetlamps. Letters to the local
> council, a green laser pointed at the daylight sensor, screening around
> your scope, a blanket over the head, an air rifle :-)
>
> There are plenty of postings on this topic, so I won't repeat them
> here. Hope this helps.
>
> Cheers
> Beats
>

That's an interesting comment about green laser, Does that actually work to
put out a street light?

Laurence E


.

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