Almost exactly two years ago, I imaged this same object using 2-pane mosaic. Now, shorter focal length of my Borg 55FL telescope enable to capture the whole nebula in the image field of the same camera. The total integration time is roughly doubled and the f-ratio of this scope is slightly faster (f/3.6) than the previous Askar FRA400 (f/3.9). Although the signal is stronger, I have noticed that the extreme light pollution (Bortle 8/9 in the very city center) leads to what is called a diminishing returns. Namely, no more noticeable signal is acquired with longer integration time. Although a bit frustrating, now I acknowledge the narrowband imaging limits of my current backyard location (a rooftop terrace, more precisely). However, much brighter DSOs are relatively easily imaged using Chroma's 3 nm narrowband filters, but this is of limited value with such a dim object as Spaghetti Nebula. Few years ago I have decided to cease RGB imaging from this location too, and rather to travel on much darker travel place. However, cold winter does not aloud me to do that in this period. Hope this information will help other imagers to decide if imaging of very dim objects is feasible from their location.
Awarded by AAPOD2 at Jan 23, 2024
https://www.aapod2.com/blog/spaghetti-nebula
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