Baader solar safety film

Use this section to discuss "standard" Baader/Coronado/ Lunt SolarView/ Daystar, etc… filters, cameras and scopes. No mods, just questions/ answers and reviews.
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Pablito
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Baader solar safety film

Post by Pablito »

Hi,

Does anyone knows what is aperture limit to use Baader ND5 solar filter? My friends is considering using it on 18" Newton scope.

Thanks in advance for any info :)


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Re: Baader solar safety film

Post by swisswalter »

Hi Pawel

no idea at all. But you could calculate it and then suggest an additional ND filter in front of the eyepiece. I guess he needs at least an ND 3 to be on the safe side. Sorry not to be of better help


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Bill Edelen
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Re: Baader solar safety film

Post by Bill Edelen »

I don't think you would ever get seeing conditions that would support that much aperture. 6" and less is all that's practical.IMO


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Re: Baader solar safety film

Post by Pablito »

Walter, Bill, thank you :)


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Re: Baader solar safety film

Post by GreatAttractor »

Paweł, it's rather determined by optical train's brightness = by focal ratio rather than aperture. Dr Hänssgen's 107 cm Dobsonian (http://www.cruxis.com/scope/scope1070.htm) works fine with ND5 at full aperture :]

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SW Mak-Cass 127, ATM Hα scopes (90 mm, 200 mm), Lunt LS50THa, ATM SSM, ATM Newt 300/1500 mm, PGR Chameleon 3 mono (ICX445)
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Re: Baader solar safety film

Post by swisswalter »

Hi Filip

wholy cow 42". Thank's for that pic. I have to show it to my CFO, it may cost me some pairs of shoes, but never mind ;)


Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)
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Re: Baader solar safety film

Post by Pablito »

WOW! Impressive :)


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Bill Edelen
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Re: Baader solar safety film

Post by Bill Edelen »

I would love to get a peek threw that :shock: Thanks for picture :mrgreen:
I looked threw your images but didn't see any solar images taken with that big scope.
Do you have some to share ?


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Re: Baader solar safety film

Post by GreatAttractor »

Bill, check out the link in my post - it's Erhard Hänssgen's telescope (whom I haven't met). I'd certainly like to try imaging with it some day :)


My software:
Stackistry — an open-source cross-platform image stacker
ImPPG — stack post-processing and animation alignment
My images

SW Mak-Cass 127, ATM Hα scopes (90 mm, 200 mm), Lunt LS50THa, ATM SSM, ATM Newt 300/1500 mm, PGR Chameleon 3 mono (ICX445)
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