Sun in CaK Lunt B600 + Omega filter

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Carbon60
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Sun in CaK Lunt B600 + Omega filter

Post by Carbon60 »

Inspired by others on this forum, I purchased an Omega CaK filter on ebay to use in conjunction with my Lunt B600. I know that this can be a bit of a risk as they are a somewhat variable in terms of quality and performance, but I thought it worth the risk.

Here are some images from yesterday and this morning. As we know, it's a pretty blank Sun, unfortunately.

Basler acA1920-155um camera
72mm f6 refractor
1.5x barlow FDs and 5x powermate for the closer views.
Omega filter mounted in a filter housing and screwed into the front of the barlow/Powermate.
Minimal ImPPG

Image20181028_CaK_FD_Mono_Omega_LuntB600 by Stuart Green, on Flickr

Image20181028_CaK_FD_Colour_Omega_LuntB600 by Stuart Green, on Flickr

Image20181027_CaK_LuntB600_Omega_Mono_x5 by Stuart Green, on Flickr

Image20181027_CaK_LuntB600_Omega_Colour_x5_clone by Stuart Green, on Flickr

I tried to do a side-by-side comparison, but the clouds had other ideas..... Here is a previous FD using the Lunt B600 alone.

Image20181020-CaK_FD_Mono by Stuart Green, on Flickr

There is a definite improvement over the Lunt module alone.

Last night was clear so I also spent a little time imaging the Moon.

Image20181028_Moon by Stuart Green, on Flickr

Thanks for looking.

A couple of additions (2.5x Powermate 2 pane mosaics).

Image20181028_CaK_FD_Omega_LuntB600 by Stuart Green, on Flickr

Image20181028_CaK_FD2_Colour_Omega_LuntB600 by Stuart Green, on Flickr

Stu.
Last edited by Carbon60 on Sun Oct 28, 2018 5:07 pm, edited 1 time in total.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sun in CaK Lunt B600 + Omega filter

Post by krakatoa1883 »

Really fine images, Stu. Have you noted any difference compared with B600 alone ?


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Re: Sun in CaK Lunt B600 + Omega filter

Post by MapleRidge »

Hi Stu...

I hope you get more opportunity to compare the combinations!

Out of curiosity, is the Omega+Barlow installed before or after the B600 CaK module?

Brian


Brian Colville

Maple Ridge Observatory
Cambray, ON Canada

Photos: https://www.flickr.com/photos/185395281@N08/albums

10'x15 Roll-off Roof Observatory
Takahashi EM400 Mount carrying:
C14 + Lunt 80ED
Deep Sky Work - ASI294MM Pro+EFW 7x36/Canon 60D (Ha mod), ONAG
Planetary Work - SBIG CFW10, ASI462MM

2.2m Diameter Dome
iOptron CEM70G Mount carrying:
Orion EON 130ED, f7 OTA for Day & Night Use
Ha Setup: Lunt LS80PT/LS75FHa/B1200Ha + Home Brew Lunt Double Stack/B1800Ha on the Orion OTA + Daystar Quantum
WL, G-Band & CaK Setup: Lunt Wedge & Lunt B1800CaK, Baader K-Line and Altair 2nm G-Band filter
ASI1600MM, ASI432MM, ASI294MM Pro, ASI174MM, ASI462MM
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Re: Sun in CaK Lunt B600 + Omega filter

Post by eroel »

Stu:
Beautiful clean and Sharp CaK images.
As for the Moon, very nice.
Best regards,
Eric.


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Re: Sun in CaK Lunt B600 + Omega filter

Post by Carbon60 »

krakatoa1883 wrote: Sun Oct 28, 2018 2:01 pm Really fine images, Stu. Have you noted any difference compared with B600 alone ?
Definitely an improvement with the Omega :)

Stu


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sun in CaK Lunt B600 + Omega filter

Post by Carbon60 »

MapleRidge wrote: Sun Oct 28, 2018 5:18 pm Hi Stu...

I hope you get more opportunity to compare the combinations!

Out of curiosity, is the Omega+Barlow installed before or after the B600 CaK module?

Brian
Hi Brian,

B600 first, directly in the focuser, then the Omega which I mounted in a holder and screwed into the front of the Barlow.

Stu


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sun in CaK Lunt B600 + Omega filter

Post by Carbon60 »

eroel wrote: Sun Oct 28, 2018 6:50 pm Stu:
Beautiful clean and Sharp CaK images.
As for the Moon, very nice.
Best regards,
Eric.
Many thanks, Eric. Maybe at some point I'll image some proms too :)

Stu


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sun in CaK Lunt B600 + Omega filter

Post by Carbon60 »

TheSkyBurner wrote: Sun Oct 28, 2018 9:31 pm looks like you won the lottery with that omega filter.
Hi Apollo, yes, I might have hit lucky with this one, although it isn't 'extremely 2A' as advertised, but it seems to work.

Stu


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Sun in CaK Lunt B600 + Omega filter

Post by marktownley »

Looks a positive improvement with the Omega there Stu. Good results.


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Re: Sun in CaK Lunt B600 + Omega filter

Post by Montana »

I am sure I see a couple of Apollo ferrets in the top two images. Looks nice Stuart, I wonder what it would be like at high res. How much light does the filter cut out? just thinking of exposure length for hi res.

Alexandra


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Re: Sun in CaK Lunt B600 + Omega filter

Post by ffellah »

Very nice results, Stu

Franco


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Re: Sun in CaK Lunt B600 + Omega filter

Post by MapleRidge »

Thanks for the filter sequence info!!!

Brian


Brian Colville

Maple Ridge Observatory
Cambray, ON Canada

Photos: https://www.flickr.com/photos/185395281@N08/albums

10'x15 Roll-off Roof Observatory
Takahashi EM400 Mount carrying:
C14 + Lunt 80ED
Deep Sky Work - ASI294MM Pro+EFW 7x36/Canon 60D (Ha mod), ONAG
Planetary Work - SBIG CFW10, ASI462MM

2.2m Diameter Dome
iOptron CEM70G Mount carrying:
Orion EON 130ED, f7 OTA for Day & Night Use
Ha Setup: Lunt LS80PT/LS75FHa/B1200Ha + Home Brew Lunt Double Stack/B1800Ha on the Orion OTA + Daystar Quantum
WL, G-Band & CaK Setup: Lunt Wedge & Lunt B1800CaK, Baader K-Line and Altair 2nm G-Band filter
ASI1600MM, ASI432MM, ASI294MM Pro, ASI174MM, ASI462MM
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Re: Sun in CaK Lunt B600 + Omega filter

Post by p_zetner »

Very nice, Stu.
I agree with you. The Omega filter gives some contrast improvement in my system as well. Maybe it does a slightly better job than the Lunt blocking filter in suppressing neighbouring etalon modes. Looks like your filter uniformity is good.
Cheers.
Peter


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