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

[pedro]

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/


IMAGING SETUPS


IMAGING SETUPS


IMAGING SETUPS


IMAGING SETUPS


IMAGING SETUPS


IMAGING SETUPS


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


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


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


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


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


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


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

[rsfoto]

Hola Pedro,

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

[eroel]

Pedro:
Interesting comparison of single double and triple stacks.
Feliz año nuevo.
Eric.

[EGRAY_OBSERVATORY]

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

Regards
Terry

[DeepSolar64]

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!

[pedro]

Thanks guys

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

[Montana]

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

Alexandra

[JochenM]

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?

[pedro]

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)

[marktownley]

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.

[Astrophil]

Pedro, the triple stack is quite impressive.

Thanks,

Phil

[MapleRidge]

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

Brian

[Carbon60]

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

Great result though.

Stu.

[robert]

Superbly thorough. (as usual!) Great to see
Robert

[pedro]

Thanks again guys

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

[christian viladrich]

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 ?
Thanks
Christian

[pedro]

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.

[JohnW]

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

[pedro]

Thanks John

It did take a lot of tuning

[dhkaiser]

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

Really sharp, well done.

[marios i.]

Beautiful images Pedro as always.

[AstroBees]

Great images and very informative.

[pedro]

thanks again guys