Today's SUN (20180829) | PST Stage 2 Mod first light

[pedro]

Today's SUN (20180829) | PST Stage 2 Mod first light. I could only image a faint prom

WEBLINK:
http://re.apaaweb.com/sun_h_alpha_2018-08.html

Tried the PST Stage 2 Mod for the first time today on an almost blank sun. Check out some images below (TMB100 F/8, PST Stage 2 Mod)


PST STAGE 2 MOD | Pedro RÉ
TMB100 F/8, Baader 110mm ERF, PST etalon, Coronado BF15
http://re.apaaweb.com


IMAGING SETUPS


IMAGING SETUPS (PST Stage 2 Mod)


IMAGING SETUPS (PST Stage 2 Mod)


IMAGING SETUPS (PST Stage 2 Mod)


SUN (20180829). TMB100 F/8 H-alpha. PST Stage 2 Mod (Baader 110mm ERF, PST etalon, BF15, X2 Bawlow (@X1.4), PGR GRASSHOPPER 3 GS3-U3-28S4M


SUN (20180829) H-alpha DISK & PROMS (09:00 UTC). LUNT60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M


SUN (20180829) H-alpha DISK & PROMS (09:00 UTC). TV101 F/5.4, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M


SUN (20180829) H-alpha DISK & PROMS (09:00 UTC). TV101 F/5.4, SM60, BF30, PGR GRASSHOPPER 3 GS3-U3-28S4M


SUN (20180829) CaK PROMS (09:00 UTC). TV101 F/5.4, LUNT 1200 CaK Module, PGR GRASSHOPPER 3 GS3-U3-28S4M


SUN (20180829) WL, CaK & H-alpha (09:00 UTC). TV101 F/5.4, LUNT 1200 CaK Module, SM60, BF30, PGR GRASSHOPPE 3 GS3-U3-28S4M

[bart1805]

Nice start! And it seems the distance between etalon and camera is a bit bigger now. At what position did you place the front lens of the etalon? I positioned the etalon in the Skywatcher (also f/8) at minus 16 cm. Should be no problem at all with the TMB because of the huge backfocus.

[pedro]

Thanks Bart

Visually I got great results even with a smaller distance (only one extension tube). It seems that the correct distance from the PST etalon is about 200mm. The soft spot is huge though

[bart1805]

Yep the lenses are -200 and + 200.
So in a f/10 scope -200 is the perfect position of the frontlens. If you place the glasspath at -160, it is at -200 from the new focus point. So there where your etalon has to be.

[pedro]

Thanks again Bart

I will have to do a few of measurements

[Montana]

A nice set of images Pedro the Sun does look rather blank

Alexandra

[pedro]

Thanks Alexandra

You're absolutely right, almost nothing to see, only a few faint proms

[Valery]

Congrats with the first light!

[pedro]

Thanks Valery