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LDN557

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CFF135/G3-16200M SV80ST/QHY163M Optolong LRGB
Astrodon RGB
Astro-Physics 1100GTO

CFF135/G3-16200 
Lum = 12x10min
RGB = 3x10min each
Ha = 20x20min 

SV80ST/QHY163M 
RGB = 32x2min each 

Total = 13hrs 22min 

This image shows several dark nebulae and an emission nebula that only shows up in Ha.