British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

BAA Community

Owl Nebula


Expand image

About this observation
Dean Ashton
Time of observation
06/04/2020 - 21:00
Observing location
St Austell, Cornwall UK
235mm (9.25") Celestron EdgeHD
CGEM mount
Nightscape 10100 CCD OSC
/f10 24x600seconds Optolong L-eNhance Filter

M97 was imaged using an Optolong L-eNhance filter during a full moon.  The L-eNhance filter transmits narrow band wavelengths for Ha, Hb and Oiii for use with a colour camera.  The filter was highly effective at blocking the moon glow.  

The Nightscape 10100 CCD was used with 1x1 binning for 10-minute exposures with the scope at it native /f10.  The CCD has small 4.75micron square pixels.  This combination did not give adequate contrast of the stars in the image for routine star-alignment of the calibrated light frames.  I will try with 2x2 binning the next time I use the filter.

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.