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105 replies to this topic

#101 bazookaman

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Posted 22 January 2021 - 06:21 PM

I read somewhere that even though the "night mode" light from screens appear red, it still contains white light and is not the same as covering it with a gel or other red filter. Is that accurate?



#102 Napp

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Posted 22 January 2021 - 08:06 PM

I read somewhere that even though the "night mode" light from screens appear red, it still contains white light and is not the same as covering it with a gel or other red filter. Is that accurate?

Best to put a red overlay over the screen and reduce the display brightness as much as possible.



#103 havasman

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Posted 22 January 2021 - 09:25 PM

BEST is to leave the screens at home.


Edited by havasman, 22 January 2021 - 09:26 PM.

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#104 Redbetter

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Posted 23 January 2021 - 12:41 AM

Thanks very much for this excellent summary. Sorry as a newbie can I ask when you say 20 MPSAS sky, is this an SQM of 20-21? I've started attending a site which regularly gets an SQM-L of 20.7 and wondering what that would translate to (my home is a horrible 17.8 and anything's better.)

22 MPSAS is pristine.  The other values were listed more as approximate mile markers and should be taken as ~21.0, 20.0. 19.0, 18.0, etc. Your 20.7 is going to fall more on the Bortle 4 end of things, still pretty good not quite 21, but much better than 20.


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#105 Sheol

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Posted 23 January 2021 - 08:24 PM

                               I DO NOT bring PC screens of any kind out into the night with me. Never have & never will. Why risk very delicate DA needed for faint galaxies & find it zapped this way? Might not happen, I'm sure some will swear by it. I will not take the chance.

 

                         Clear Skies,

                               Matt.


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#106 bazookaman

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Posted Today, 06:49 PM

But then if you have a medical emergency or car trouble, you're out of luck.




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