17092017-AR2680 and western limb

[bart1805]

This time I did take a flat so did not have to work very hard to remove the gradients. Unfortunately no time to compare the double stack with the singe stack.
Bresser 127 with two PST etalons etc.

AR2680

170917_10h14m_Br127_DS_PM2,5x_AR2680_PS by bart moors, on Flickr

AR2680 inverted and coloured

170917_10h14m_Br127_DS_PM2,5x_AR2680_PS_Inverted by bart moors, on Flickr

And a coloured version of the western limb

170917_10h23m_Br127_DS_PM2,5x_westernlimb_PSinverted by bart moors, on Flickr

Thanks for watching! Bart.

[rsfoto]

Great images

[bart1805]

Thanks Rainer!

[Montana]

Fantastic images, I really enjoyed these
Alexandra

[marktownley]

You're getting nice results with that Bresser!

[Merlin66]

Bart,
Just re-visiting the PST DS thread.....
Any updates on your set-up???

[bart1805]

Hi Merlin,
A few, but not so much doublestack H-alpha related....
Just bought a CEM60 with a tripod pier. Much easier to transport into the garden than the HEQ5 on the pillar mount.
The doublestack CaK filter is ready, telescope is ready to begin testing. Although the sun is quite low now, this weekend looks promising.
Still struggling with the 150mm f8 Skywatcher. Changed the focuser, that seems to be an improvement. Doublestack seemed to work better with the 127mm Bresser, so I am looking forward to more testing this spring.
CS! Bart.

[ffellah]

Excellent results, Bart ! Great detail and processing

Franco

[eroel]

Bart:
Really nice clean and crisp shots.
Best regards,
Eric.

[MAURITS]

Very very nice Bart, congrats ...

[Carbon60]

Lovely historical shots, Bart.

Stu

[bart1805]

Thanks guys and thanks Ken for reviving this thread. Which, by the way, is also a bit painful. This session was one of the few successful sessions with two stacked PST etalons. I switched to the Skywatcher 150mm and gained 2,3 cm but never had the succes as with the Bresser. Will try it again this spring and then decide to maybe go back to the Bresser. CS! Bart.

[Merlin66]

Bart,
I said back in 2009, that the PST DS was a pain in the butt to tune, so much so I gave up.....
Following your success and finding more rusty pins to stick in my eye (!!) I'm going to revisit this option.
Certainly an interesting option.....