Nicola Beltraminelli took this amazing shot of the bubble nebula using his Stellarvue SVX180T under a Bortle 4 sky in France about 80km from Lyon. 

Specifications: Stellarvue SVX180 + SFFX-2 Field Flattener
Imaging Camera ZWO ASI6200MM Pro
Mount 10Micron GM2000 HPS II Chroma H-alpha 3nm Bandpass 50 mm: 100×300″(8h 20′) (gain: 100.00), -20°C bin 1×1Chroma SII 3nm Bandpass 50 mm: 75×300″(6h 15′) (gain: 100.00), -20°C bin 1×1Chroma OIII 3nm Bandpass 50 mm: 75×300″(6h 15′) (gain: 100.00), -20°C bin 2×2Chroma Blue 50 mm: 20×60″(20′) bin 1×1 Chroma Green 50 mm: 20×60″(20′) bin 1×1
Chroma Red 50 mm: 20×60″(20′) bin 1×1Total of: 21h50min SoftwareAdobe Lightroom Adobe Photoshop Luc Coiffier DeepSkyStacker (DSS) Nikita Misiura StarNet Pleiades Astrophoto PixInsight Russell Croman Astrophotography BlurXTerminator Russell Croman Astrophotography NoiseXTerminator