Hello to all,
I am an amateur astronomer (Ischia - Italy) and I am very happy with the birth of this new section dedicated to the research of novae.
I'm a fan of this field of research and for some years I dedicate myself to photographic research of novae.
I use a DSLR camera Canon 600D with lens Canon EF-S 18mm-55mm f/3.5 - 5.6 IS Zoom, mounted in parallel to the telescope on Eq6 Pro mount.
For my photographic research I use the maximum focal length 55mm f/5.6 with 60 seconds of exposure and ISO 800.
With this configuration I take large areas of the Milky Way 24x16 degrees down to magnitude 10.5-11.
Recently, however, I was thinking of buying a fixed focal length lens because everyone says that these lens are better than zoom. However, I am very undecided whether to take it and especially what to take.
First, I am undecided whether to take a 50mm lens or one with greater focal lenght, for example 85mm or 100mm. If I increase the focal length then I have to take many more images to cover the areas of research but, probably, I have a higher resolution and could increase magnitude limit.
However, if I decide to stay on the focal length of 50mm, I wonder if it's worth actually get one fixed focal length or continue with my zoom lens.
You who are definitely more experienced than me, can you give me some advice?
Best regards and clear skies.