Today's SUN (20210103) | LUNT60 (single, double & triple stack)

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Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by pedro » Sun Jan 03, 2021 8:45 pm

Today's SUN (20210103) | LUNT60 (single, double & triple stack)

WEB LINK:
http://pedroreastrophotography.com/sun_ ... 21-01.html


Solar imaging session (20210103) | Pedro RE'
LUNT60 Single, Double, & triple Stack (SM60/SM40)
GS3-U3-28S4M, Takahashi EM-400
http://pedroreastrophotography.com/

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IMAGING SETUPS

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IMAGING SETUPS

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IMAGING SETUPS

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IMAGING SETUPS

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IMAGING SETUPS

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IMAGING SETUPS

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SUN (20210103) H-alpha (09:30 UTC). LUNT60, TS SM60/SM40, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20210103) H-alpha (09:30 UTC). LUNT60, DS SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20210103) H-alpha PROMS (09:30 UTC). LUNT60, DS SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20210103) H-alpha PROMS (09:00 UTC). LUNT60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20210103) H-alpha PROMS (09:00 UTC). TV101 F/5.4, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20210103) CaK PROMS (09:00 UTC). TV101 F/5.4, LUNT 1200 CaK Module, PGR GRASSHOPPER 3 GS3-U3-28S4M

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SUN (20210103) WL, CaK & H-alpha (09:00 UTC). TV101 F/5.4, LUNT 1200 CaK Module, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4



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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by rsfoto » Sun Jan 03, 2021 9:05 pm

Hola Pedro,

That is an interesting comparison between single, double and triple stack. Thank you.


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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by eroel » Sun Jan 03, 2021 11:50 pm

Pedro:
Interesting comparison of single double and triple stacks.
Feliz año nuevo.
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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by EGRAY_OBSERVATORY » Mon Jan 04, 2021 1:03 am

That triple-stack certainly well-increases the contrast Pedro. Well done as usual.

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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by DeepSolar64 » Mon Jan 04, 2021 6:38 am

I don't see people triple stack that much. I bet visually the image would be quite dim. It results in very good contrast on your images though!


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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by pedro » Mon Jan 04, 2021 9:35 am

Thanks guys

I did not tried these combos visually. The sun will be very dim as James mentions



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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by Montana » Mon Jan 04, 2021 11:58 am

Wow!! that triple stack is a killer shot!! delicious :bow :hamster: can you post exposure times for all three?

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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by JochenM » Mon Jan 04, 2021 12:02 pm

Interesting side-by-side comparison there, Pedro. Must have been a bit of effort to get all three etalons perfectly tuned.

Out of curiousity, how much did that triple-stack influence the exposure times?



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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by pedro » Mon Jan 04, 2021 12:59 pm

Thanks Jochen

The triple stack has a huge influence in the exposure time. I had to increase gain, usually I never do that

The result is interesting. I also used the the autostakkert flat field option (it is not easy to adjust the three etalons - two front-loading and one end-loading)



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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by marktownley » Mon Jan 04, 2021 7:58 pm

Great results Pedro! I tried the triple stack route a good few years ago now, I like the contrast that it gives, but for me the increase in exposure time and fiddly tuning meant I never pursued it.


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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by Astrophil » Tue Jan 05, 2021 12:02 am

Pedro, the triple stack is quite impressive.

Thanks,

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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by MapleRidge » Tue Jan 05, 2021 12:14 am

These are excellent images and your triple stack turned out much sharper than mine...well done :bow

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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by Carbon60 » Tue Jan 05, 2021 6:50 am

Excellent, Pedro. I can only imagine the challenges tuning all three etalons :)

Great result though.

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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by robert » Tue Jan 05, 2021 8:11 am

Superbly thorough. (as usual!) Great to see
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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by pedro » Tue Jan 05, 2021 6:27 pm

Thanks again guys

As I mentioned before it is hard to tune all three etalons. I guess I will stick with double stack



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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by christian viladrich » Tue Jan 05, 2021 6:59 pm

Hello Pedro,
This is excellent. A big THANKS for sharing this.
Looking at these, I found the triple stack image a bit less crispy than the others. My understanding is that the triple stack samples a layer higher is the chromosphere, and the higher the layer the less crispy are the details. We can see this phenomenum in professional images too.
Do you thing that a difference in seeing / exposure time could also be an explanation ?
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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by pedro » Tue Jan 05, 2021 8:50 pm

Thanks Christian

I agree completely, the triple stack images are less crisp. I have to add that the third etalon used was a pre-meade SM40 with a lower aperture.



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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by JohnW » Tue Jan 05, 2021 9:13 pm

Thanks Pedro - an interesting set of comparison images. Must have taken a lot of tuning. Regards, John W.




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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by dhkaiser » Wed Jan 06, 2021 2:33 am

STOP with the triple stacking. You will influence my solar expenditures!

Really sharp, well done.


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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by marios i. » Wed Jan 06, 2021 8:09 am

Beautiful images Pedro as always.


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Re: Today's SUN (20210103) | LUNT60 (single, double & triple stack)

Post by AstroBees » Wed Jan 06, 2021 7:10 pm

Great images and very informative.


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