Hello,
I would like to know what the usual duration of BF filters on Lunt telescopes is, I mean, how long they can provide a good picture without having to change them? thank you in advance.
Nebu
Usual duration BF filters(Lunt)
- Merlin66
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Re: Usual duration BF filters(Lunt)
The pre-blocking filters on both the Coronado and Lunt BF are subject to failures...
They can fail after a few months or last for years....
The good news is that Lunt appear to be replacing their Blue BG38 filters free of charge upon request.
They can fail after a few months or last for years....
The good news is that Lunt appear to be replacing their Blue BG38 filters free of charge upon request.
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https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer