Hi All
What advantage if any is a Pressure tuner over a Tilt tuner? Thanks in advance. Bill
Lunt 60mm Tilt Tune
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Lunt 60mm Tilt Tune
Lunt pressure tuned 60mm
Orion ST 80mm
Bausch and Lomb 90mm
Quark Chromosphere / 130mm ERF
Antlia 35mm prism with 1.25" cak filter
Starfield 2" herschel wedge
Celestron 10x42 white light binos
various Barlows and Filters
Player one :
Neptune M IMX 178m
Apollo M IMX 174m
Apollo Mini IMX 429m
Apollo -M Max IMX 432m
Sky Watcher SolarQuest
EQ 5 Black
Orion ST 80mm
Bausch and Lomb 90mm
Quark Chromosphere / 130mm ERF
Antlia 35mm prism with 1.25" cak filter
Starfield 2" herschel wedge
Celestron 10x42 white light binos
various Barlows and Filters
Player one :
Neptune M IMX 178m
Apollo M IMX 174m
Apollo Mini IMX 429m
Apollo -M Max IMX 432m
Sky Watcher SolarQuest
EQ 5 Black
- Bob Yoesle
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Re: Lunt 60mm Tilt Tune
Pressure tuned etalons can theoretically be used at a greater range of altitudes (e.g. they are impervious to barometric pressure changes, which alter the etalon gap refractive index). Tilt-tuned etalons are more sensitive to altitude changes. If in a good range of tuning at sea level, going to higher altitude will reduce the refractive index of the etalon gap, and blue shift the etalon CWL. It would have a reduced tuning range, and may not even be able to get on band at much higher altitudes. However, this seems to be a rare event, and can be remedied with a tilt-tuned etalon with a different CWL.
Tilt tuned etalons therefore needed to also have much more stringent spacer thicknesses (CWL) to be usable at a range of altitudes, and some therefore feel they perform a little better than their PT cousins. There does seem to be a much wider variation in etalon CWL with PT etalons.
Bob
Tilt tuned etalons therefore needed to also have much more stringent spacer thicknesses (CWL) to be usable at a range of altitudes, and some therefore feel they perform a little better than their PT cousins. There does seem to be a much wider variation in etalon CWL with PT etalons.
Bob
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Re: Lunt 60mm Tilt Tune
Tilt tuned etalons can also show a more unevenly illuminated field of view if they require too much tilt to get them on band... This is the same for internal and external tilt tuned etalons...
http://brierleyhillsolar.blogspot.co.uk/
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Re: Lunt 60mm Tilt Tune
Thank You Bob and Mark for the replies I live at about sea level and will be also using the scope at about 342m or 1122 feet .
I can retro fit the tilt tune to pressure and am wondering if it is worthwhile.
Thx Bill
I can retro fit the tilt tune to pressure and am wondering if it is worthwhile.
Thx Bill
Lunt pressure tuned 60mm
Orion ST 80mm
Bausch and Lomb 90mm
Quark Chromosphere / 130mm ERF
Antlia 35mm prism with 1.25" cak filter
Starfield 2" herschel wedge
Celestron 10x42 white light binos
various Barlows and Filters
Player one :
Neptune M IMX 178m
Apollo M IMX 174m
Apollo Mini IMX 429m
Apollo -M Max IMX 432m
Sky Watcher SolarQuest
EQ 5 Black
Orion ST 80mm
Bausch and Lomb 90mm
Quark Chromosphere / 130mm ERF
Antlia 35mm prism with 1.25" cak filter
Starfield 2" herschel wedge
Celestron 10x42 white light binos
various Barlows and Filters
Player one :
Neptune M IMX 178m
Apollo M IMX 174m
Apollo Mini IMX 429m
Apollo -M Max IMX 432m
Sky Watcher SolarQuest
EQ 5 Black
- Bob Yoesle
- Almost There...
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Re: Lunt 60mm Tilt Tune
I'd wait to se how well it works - it could be and probably will be just fine.
Diagonally parked in a parallel universe.
Curiosity is the father of knowledge; uncertainty is the mother of wisdom.
Dark-Sky Defenders
Goldendale Observatory
Curiosity is the father of knowledge; uncertainty is the mother of wisdom.
Dark-Sky Defenders
Goldendale Observatory
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- Im an EXPERT!
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Re: Lunt 60mm Tilt Tune
Thank you Bob
Will be waiting on good weather nothing but rain right now
Will be waiting on good weather nothing but rain right now
Lunt pressure tuned 60mm
Orion ST 80mm
Bausch and Lomb 90mm
Quark Chromosphere / 130mm ERF
Antlia 35mm prism with 1.25" cak filter
Starfield 2" herschel wedge
Celestron 10x42 white light binos
various Barlows and Filters
Player one :
Neptune M IMX 178m
Apollo M IMX 174m
Apollo Mini IMX 429m
Apollo -M Max IMX 432m
Sky Watcher SolarQuest
EQ 5 Black
Orion ST 80mm
Bausch and Lomb 90mm
Quark Chromosphere / 130mm ERF
Antlia 35mm prism with 1.25" cak filter
Starfield 2" herschel wedge
Celestron 10x42 white light binos
various Barlows and Filters
Player one :
Neptune M IMX 178m
Apollo M IMX 174m
Apollo Mini IMX 429m
Apollo -M Max IMX 432m
Sky Watcher SolarQuest
EQ 5 Black