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Deep Helix
SPX350 F4.5, ST10XME, Astrodon filters Ha5nm OIII 3nm.
Thought I would see what a deeper pixel well would do compared to the 314L+ and it sure brings out the fainter stuff with less noise. With 10min subs the black levels read 95 with the auto stretch in CCDSoft much lower than the 200+ with the 314. The outer material shows very well and the OIII rays are strong.
Had many difficulties with egg stars, loosened my EQ6 RA mesh and autoguiding improved, continual bad seeing, occasional secondary misting and sometimes egg stars in the corner with the heavy ST10 not sitting square when focuser screws tightened.
Ha-4hrs
OIII-6hrs all in 10min subs.
Colour:
Ha-red
OIII-blue
Ha25%OIII75%-green.
1st image Ha used as luminance
2nd image show detail
3rd image used OIII as luminance
4th image OIII lum image over processed and reduced for better emphasis.
Thanks for looking, John.
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