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In the Media... / Light pollution: Night being lost in many countries
« Last post by Rick on Yesterday at 19:56:56 »
Light pollution: Night being lost in many countries

A study of pictures of Earth by night has revealed that artificial light is growing brighter and more extensive every year.

Between 2012 and 2016, the planet's artificially lit outdoor area grew by more than 2% per year.
Scientists say a "loss of night" in many countries is having negative consequences for "flora, fauna, and human well-being".

A team published the findings in the journal Science Advances

More: http://www.bbc.co.uk/news/science-environment-42059551
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Technical / Re: Sony a7R III: The Star Eater is No More
« Last post by Fay on Yesterday at 19:01:38 »
we need our champion, Mark, to put him right!!   
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Announcements, Meetings, Events / Re: Tomorow's meeting tea rota
« Last post by RobinA on Yesterday at 16:45:15 »
I can help

Robin
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Technical / Re: Sony a7R III: The Star Eater is No More
« Last post by Carole on Yesterday at 10:35:04 »
Some right arrogant and ignorant replies on that article:

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If these alleged "serious" astrophotgraphers *really* cared about "single-pixel" stars and noise discrimination, they'd be using an equatorial mount, as well as stacking software and dark field removal algorithms, stacking multiple 3.2-sec exposures that are not affected by LENR.
Taking multiple exposures in quick succession is easy to do with mirrorless cameras that have a fully electronic, vibration-free shutter that doesn't need to be cocked by a motor.

If they don't even use an equatorial mount, then, the resulting star trails will necessarily be longer in spatial extent than a single pixel, and thus unlikely to be affected by a LENR that targets single hot pixels.

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As I said, nothing prevents these "astrophotographers" obsessing about "single-pixel" stars from stacking multiple 3.2-sec exposures, except their own laziness or incompetence.

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Too many stars as it is. Looks like a bunch of noise.

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If you're serious about shooting stars -you don't use a camera like a Sony, or Canon. You use a tool designed for the job.
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Technical / Re: Sony a7R III: The Star Eater is No More
« Last post by JohnP on Yesterday at 08:25:21 »
:-( I guess at the end of the day the % of these camera's that they sell to astro-photographers is so small compared to the overall sales they don't give shit... it would be so simple for them to remove the offending code or even add a line of code so there is a menu choice to switch the hot pixel reduction on or OFF... Would be so good if someone with the skills could 'hack' it...
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Announcements, Meetings, Events / Re: Tomorow's meeting tea rota
« Last post by Carole on Nov 21, 2017, 21:46:16 »
If no-one gets on the forum in time, you might have to sort it when we get there Rafal, I am afraid I am selling calendars so not free to help.

Carole
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Announcements, Meetings, Events / Tomorow's meeting tea rota
« Last post by RafalK on Nov 21, 2017, 21:31:15 »
Unfortunately my pal Robert has work commitments tomorrow, so I'm looking for a volunteer to help me with the tea/coffee rota. Rob is happy to swap with someone on a future rota if possible.
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Astrophotography / Re: Crab Nebula M1 WIP
« Last post by Carole on Nov 21, 2017, 13:46:42 »
Thanks Fay, yes from home.

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I have about 6 of these and whichever ones i use , never had a problem , i seal any join with Duct Tape. Keeps the join together and the damp out.
Roger
Amazon:
https://www.amazon.co.uk/gp/product/B00NH11PEY/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

I have had my USB extension cables for getting on for 8 years, so perhaps they have got a bit corroded over the years.  I have never bothered to seal them though.   Never had a problem with them before this last few months (assuming its the USB extension cables that are the problem).
Have ordered some new ones today only cost a fiver for 3.  Also got some shorter ones than I had before as some of them were far too long. 

Carole
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Astrophotography / Re: Crab Nebula M1 WIP
« Last post by Fay on Nov 21, 2017, 10:55:32 »
Looking good Carole. is this taken from home?
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