19 Nov 2020 AR2783 in Ha and Continuum

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Fabio_Imm
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19 Nov 2020 AR2783 in Ha and Continuum

Post by Fabio_Imm »

Hello,
I received a tilt adapter, so I finally got rid of NRs in Ha imaging.
Thanks to a drop in temperature, the seeing was much better so the imaging session was really nice.
I also experimented with a high transmission setup for solar continuum imaging, tried after running some spreadsheet calculations using ASTM G-173-03 tables to be reasonably sure not to fry the camera sensor :D .

Ha setup
SS60 Quark etalon on an 80ED scope
Basler acA1920-155um
Image10m__2020-11-19_T1 by Fabio Immovilli, su Flickr

Solar Continuum setup
WARNING! Photographic use only: absolutely not eye safe!!!!
80ED scope + 2" UV/IR cut + 2" Baader solar continuum (on 80mm extension tubes) + ND3 filter on camera nose
Basler acA1300-30gm
With the high transmission setup I could go down to 400-500 us exposure times and that relly helped "freezing" atmospheric turbulence.
I got carried away and forgot to take flat field with this setup :lol: so forgive me for the dust bunny in the picture :oops:

Imagecont__2020-11-19_T2 by Fabio Immovilli, su Flickr

Cheers

Fabio


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Re: 19 Nov 2020 AR2783 in Ha and Continuum

Post by EGRAY_OBSERVATORY »

Some real-nice images Fabio - thanks for sharing

Terry


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Re: 19 Nov 2020 AR2783 in Ha and Continuum

Post by dhkaiser »

Well done Fabio.


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Re: 19 Nov 2020 AR2783 in Ha and Continuum

Post by Montana »

Fabulous!! I love the white light :bow :hamster:

Alexandra


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Re: 19 Nov 2020 AR2783 in Ha and Continuum

Post by Carbon60 »

Excellent WL, Fabio. Ha may be a little off-band,or broad-band, but your set-up looks promising.

Stu.


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Fabio_Imm
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Re: 19 Nov 2020 AR2783 in Ha and Continuum

Post by Fabio_Imm »

Hi Stu,
Since the quark etalon was installed in a "cheap" Solar Scout scope it may have a broader bandwidth than the ones sold as standalone units.
I still haven't figured out whether my quark unit is broadband or off-band: I find the most detail when setting the adjustment 2-3 clicks CCW and that would be "blue shifted" according to the manual.
I must find the time for a 3+ hour imaging session (at least) to thoroughly go through all the individual clicks of the adjustment knob...

Cheers
Fabio


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Re: 19 Nov 2020 AR2783 in Ha and Continuum

Post by Montana »

Definitely find the time Fabio, it is well worth it as all Quarks are not made with centre-line at zero. On my Quarks centre-line was at 6 clicks CW, pity there wasn't a 6th setting ;)

Alexandra


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