A little foggy here this morning, but burned off to a blue
sky by mid morning. Fairly good seeing as a result
Image link here
http://www.atscope.com.au/BRO/gallery585.html
December 26th Ha Disk.
- DeepSolar64
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Re: December 26th Ha Disk.
Peter,
This image is sharp and tuned very even. Using an AP130 is going to reveal very sharp images seeing permitting but I am wondering whether you are using Meade or Pre-Meade Coronado etalons? It's been said the David Lunt Coronado Tuscon etalons tune more evenly and give a more uniform disc than the later Meade Coronado etalons. Your discs are evenly tuned and illuminated. Very nicely done!!
James
This image is sharp and tuned very even. Using an AP130 is going to reveal very sharp images seeing permitting but I am wondering whether you are using Meade or Pre-Meade Coronado etalons? It's been said the David Lunt Coronado Tuscon etalons tune more evenly and give a more uniform disc than the later Meade Coronado etalons. Your discs are evenly tuned and illuminated. Very nicely done!!
James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Visual Observer
" Way more fun to see it! "
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Visual Observer
" Way more fun to see it! "
Re: December 26th Ha Disk.
Ta. I am using a pre-Meade i.e. Lunt SM90 (not tunable) and a post Meade 90mm (tunable) in the double stack.
Indeed the Meade eatlon sadly does not have the same contrast as the Lunt. That said, I've found front mounted etalons
have very even illumination across a wide field compared to rear mounted types.
Tuning the pair is not too difficult.
I simply bump up the exposure and use high contrast gamma to center the "hot-spot"
in the middle of the disk. I'll then turn off any in-camera gamma correction and expose to around 95% saturation
using Firecapture's intensity histogram.
A recent change in my image train was to replace the BF30 ITF (which was "rusting") with a Beloptik ITF.
It lowered the bandpass and improved contrast significantly. Highly recommended.
Indeed the Meade eatlon sadly does not have the same contrast as the Lunt. That said, I've found front mounted etalons
have very even illumination across a wide field compared to rear mounted types.
Tuning the pair is not too difficult.
I simply bump up the exposure and use high contrast gamma to center the "hot-spot"
in the middle of the disk. I'll then turn off any in-camera gamma correction and expose to around 95% saturation
using Firecapture's intensity histogram.
A recent change in my image train was to replace the BF30 ITF (which was "rusting") with a Beloptik ITF.
It lowered the bandpass and improved contrast significantly. Highly recommended.
- DeepSolar64
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Re: December 26th Ha Disk.
Peter,
The new Coronado SolarMax III series have both of their etalons mounted externally. I really wonder how they do compared to the SolarMax II etalons. One of the SMII's is an internal etalon.
Meade Coronado still is not selling the SMIII etalons separately from the scope to the best of my knowledge and the SMII stuff is slowly dwindling down. The SMII line is slowly being phased out in favor of the SMIII line. The scopes are already hard to find new.
I have heard a lot of good things about Beloptik.
James
The new Coronado SolarMax III series have both of their etalons mounted externally. I really wonder how they do compared to the SolarMax II etalons. One of the SMII's is an internal etalon.
Meade Coronado still is not selling the SMIII etalons separately from the scope to the best of my knowledge and the SMII stuff is slowly dwindling down. The SMII line is slowly being phased out in favor of the SMIII line. The scopes are already hard to find new.
I have heard a lot of good things about Beloptik.
James
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Visual Observer
" Way more fun to see it! "
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado SolarMax II 90 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Sky-Watcher AZGTI Alt-Az GoTo mount
Cameras: ZWO ASI178MM, PGR Grasshopper, PGR Flea
Lunt, Coronado, TeleVue, Orion and Meade eyepieces
Visual Observer
" Way more fun to see it! "
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Re: December 26th Ha Disk.
Excellent disk Peter
Warren
Lunt LS60T DS
Orion ED80T CF
Meade ETX LS6
Lunt CaK BF1200
Lunt WL Wedge
Baader Photographic Film
ASI174MM
Skyris 236M
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https://www.astrobin.com/users/rigel123/
Lunt LS60T DS
Orion ED80T CF
Meade ETX LS6
Lunt CaK BF1200
Lunt WL Wedge
Baader Photographic Film
ASI174MM
Skyris 236M
Player One Saturn-M SQR
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Re: December 26th Ha Disk.
Superb FD image Peter
Brian
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
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