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In reply to: Makeing a white light filter for my 10″ Dobsonian
Posted by Paul A Brierley at 17:32 on 2010 May 21
Cheers Callum,I will use the dust cover I have for my ZS66SD. I have been a casual solar observer on and off for a number of years, and I hope that with my new 10" Dob which is, after all so easy to set UP. It might encourage me to do more in the way of Solar observing.I might even be tempted to join the solar section!
In reply to: White LED street lighting
Posted by Dale Holt at 13:29 on 2010 May 10
Thanks to David for outlining some of the lesser known facts around LED street lighting. It does sound very worrying and already happening if David can witness deterioration from his NW London location.I have often wondered why more of the low level bollard type lighting isn’t used by local authorities as the units must be considerably cheaper that full lamp posts, especially for pedestrian only applications.Movement detection is also a good idea but with the energy usage being that much lower with LED’s the cost & environment cards will have already been satisfied to a greater extent, the advantages to residents & councils will not be so attractive.I think the serious option for many astronomers trapped in light polluted areas will be to concentrate or areas of astronomy that are less effected by the scourge of poor lighting, i.e. Lunar, Solar, Planetary. Double stars etc or to join the increasing number of UK astronomers accessing scope remotely under really dark skies. I appreciate that theses means imaging and not visual observation but what else can a small group of astronomers realistically do to prevent it?Dale Holt
In reply to: Welcome to the new Forum
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