NGC 7635 Bubble Nebula – Bi Colour Palette

Last night was the first clear night for a couple of weeks so, despite it being full moon, I decided to set up and have a go at some narrowband imaging. I selected NGC 7635 – Bubble Nebula – as my target as it looks interesting and I haven’t tried imaging it before. The Bubble […]

What is narrow band imaging?

Narrow band imaging refers to imaging using filters that only let through a very narrow range of the light spectrum, often 0.07nm or less. They effectively block all other light frequencies. The spectral width of these filters therefore blocks out a lot of light pollution – light from streetlights in towns and cities that reflects […]