I see comments on the European forums that the replacement Lunt Blue Filters (originally BG38?) are a "new design" which is coated to prevent the current failures.
I can't get this confirmed from suppliers.......
Can anyone confirm a recent change to this filter?????
Lunt "Blue Filter" -new design/ construction
- Merlin66
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Lunt "Blue Filter" -new design/ construction
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Re: Lunt "Blue Filter" -new design/ construction
Hi,
I did no know that this filters also degrade ...
Interesting
I did no know that this filters also degrade ...
Interesting
regards Rainer
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Observatorio Real de 14
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Re: Lunt "Blue Filter" -new design/ construction
No idea Ken, I will keep my eyes and ears open though...
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Re: Lunt "Blue Filter" -new design/ construction
Bresser Europe have replied:
"""you are right, the manufacturer Lunt Solar Systems has told us that the "Blue Glass" has now a coating. It is available in our online-shop:
https://www.bresser.de/en/Astronomy/Spa ... lters.html"""
No technical details available.
Maybe a follow-up directly with Lunt?
"""you are right, the manufacturer Lunt Solar Systems has told us that the "Blue Glass" has now a coating. It is available in our online-shop:
https://www.bresser.de/en/Astronomy/Spa ... lters.html"""
No technical details available.
Maybe a follow-up directly with Lunt?
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
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Re: Lunt "Blue Filter" -new design/ construction
Interesting and as said will only really apply to non-dehumidified locations/storage or
"if the blocking-filter was storded at high air humidity for some time."
Obvious answer in that comment, so at least don't leave the blocking filter in damp conditions, as I well know after over 11-years of keeping my gear in a de-humidified environment and not having to remove the BF...
Terry
"if the blocking-filter was storded at high air humidity for some time."
Obvious answer in that comment, so at least don't leave the blocking filter in damp conditions, as I well know after over 11-years of keeping my gear in a de-humidified environment and not having to remove the BF...
Terry