Rosette nebula NGC2237

Posted: Mar 3rd, 2025

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NGC

Technical Info

Telescope/Lens: Zeiss Apo Sonnar 135\f2

Camera: ZWO ASI 1600MM Pro

Mount: HEQ5 Pro

Software: Siril

Exposure:

40 x 120" ISO/Gain: 139 - Ha

70 x 120" ISO/Gain: 139 - Olll

Green, Bortle 4 zone:

Salcininkai, Lithuania

Mar 2nd, 2025

3 h 40 m

566

Resolution: 4307x2733 px

Scale: 57415 KB

Test approach with Baader Hα 7nm and OIII 4nm narrowband filters on a fast lens. In OIII signal is insufficient filter up to f3.5 and more.

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