AR2659 and Plage Region with Aries DERF, CPC925 and Quark

[nickatnight]

Today I wanted to troubleshoot my noise issue, but I think Marty nailed it on my last post. Think I have been under-exposing the capture and then stretching the exposure in processing. These were shot trying to keep the histogram as far to the right without clipping the hightlights. I think there is definately better results with lower noise. Shot with Aries DERF, CPC925, Daystar UVIR Cut, Baader 3x telecentric, Combo Quark, C-Mount .67x reducer within tilt adapter, ZWO ASI174MM camera. Processed with AS!2, AstraImage and Photoshop. Comments and suggestions welcome.

ar2659_cpc925_b3x_quark_asi174mm_crop_early_v5c.jpg (270.04 KiB) Viewed 1419 times

And an interesting Plage region on the opposite side of Sun...

plage_cpc925_b3x_quark_asi174mm_crop_early_v5d.jpg (207.63 KiB) Viewed 1419 times

[Valery]

You are getting closer and closer to the perfection. Congratulates!

Suggestions:

1. Movie cadence 15-20sec.
2. Try to stack several numbers of frames (up to 50% of good seeing movies)
3. Try to use a bit narrower curve width (in Lucy-Richardson deconvolution). Better to try also different curve widths.
4. If your images are not shrp enough, try to scale down 0,95x, 0,9 up to 0,75 - depends of you taste.

Hope this helps.

Valery

[Carbon60]

Improving all the time, Nick.

I try to capture using the full histogram range, whilst avoiding clipping and for combined prom/disk images I reduce gamma to lower the degree of contrast. Keep exposure times to a minimum, take 1000-2000 frames and stack the best 5%-20%. It takes practice with your own particular setup to know what works or you.

Stu

[MalVeauX]

Looks great!

Very best,

[PDB]

Yep. Getting better, less noise. Going good.

Paul

[Montana]

Much better, these are really lovely
Alexandra

[MapleRidge]

This session shows very sharp details Nick...the improvements are paying off!!!

Brian

[Derek Klepp]

Getting there Nick.More features than I ever get with 100mm