Today's SUN (20180414) | LUNT152/Coronado SM90II DS

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pedro
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Today's SUN (20180414) | LUNT152/Coronado SM90II DS

Post by pedro » Sat Apr 14, 2018 7:17 pm

Today's SUN (20180414) | LUNT152/Coronado SM90II DS

WEBLINK:
http://re.apaaweb.com/sun_h_alpha_2018-04.html

Tried finally the LUNT152/Coronado SM90II (double stack)

The results are interesting. Check out some images below (small AR)

Before you ask I prefer the single stack images (less contrast but better definition)

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IMAGING SETUPS

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IMAGING SETUPS

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IMAGING SETUPS

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LUNT152 + CORONADO SM90II (DOUBLE STACK)

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JAEGERS 5" F/5 + CORONADO SM90II

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SUN (20180414) H-alpha PROMS. LUNT152, SM90II (single stack, double stack), BF30, Bawlow X2 (@X1.4), PGR GRASSHOPPER 3 GS3-U3-28S5M

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OBSERVATORIES (DJI INSPIRE ONE)

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SUN (20180414) H-alpha PROMS. LUNT152, SM90II (double stack), BF30, Bawlow X2 (@X1.4), PGR GRASSHOPPER 3 GS3-U3-28S5M

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SUN (20180414) H-alpha PROMS. LUNT152, BF30, Bawlow X2 (@X1.4), PGR GRASSHOPPER 3 GS3-U3-28S5M

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SUN (20180414) H-alpha PROMS. LUNT152, BF30, Bawlow X2 (@X1.4), PGR GRASSHOPPER 3 GS3-U3-28S5M

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SUN (20180414) H-alpha DISK & PROMS. LUNT152, SM90II, BF30, PGR GRASSHOPPER 3 GS3-U3-28S5M, two-pane mosaic

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SUN (20180414) H-alpha DISK. LUNT152, SM90II, BF30, PGR GRASSHOPPER 3 GS3-U3-28S5M, two-pane mosaic

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SUN (20180414) H-alpha DISK & PROMS (08:30 UTC). LUNT60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S5M

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SUN (20180414) H-alpha DISK & PROMS (08:30 UTC). LUNT60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20180414) H-alpha DISK & PROMS (08:30 UTC). TV101 F/5.4, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20180414) H-alpha DISK & PROMS (08:30 UTC). TV101 F/5.4, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20180414) CaK PROMS (08:30 UTC). TV101 F/5.4, LUNT 1200 CaK Module, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20180414) WL, CaK & H-alpha (08:30 UTC). TV101 F/5.4, LUNT 1200 CaK Module, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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ffellah
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Re: Today's SUN (20180414) | LUNT152/Coronado SM90II DS

Post by ffellah » Sun Apr 15, 2018 12:20 am

Hi Pedro: great images. You are right, the prominences came better in single than double stack. Sharper. Also the edge of the disk and spicules are sharper. Was the focus the same for both settings ? Maybe the focus was more difficult to achieve in DS ?

Franco

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Re: Today's SUN (20180414) | LUNT152/Coronado SM90II DS

Post by marktownley » Sun Apr 15, 2018 8:52 am

Nice shots Pedro, you've got a good single stack which is one of the reasons there's not a huge difference I guess.
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Re: Today's SUN (20180414) | LUNT152/Coronado SM90II DS

Post by pedro » Sun Apr 15, 2018 9:36 am

Thanks Franco & Mark

With the DS configuration you have more glass in the way (and a lower aperture as well). The focus does not vary a lot. Seeing was not bad during the imaging session.

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