I have bunch of new equipment on the way. One item is the zwo 1600 pro monochrome camera with filter wheel. The filter wheel comes with 7nm filters. I live in a Bortle 8 zone and I'm looking forward to taking advantage of the narrowband filters. I know that 3nm is much better than 7nm when it comes to things such as halos around stars.
I'm used to imaging with a Canon 5D mark IV and no filters.
What can I look forward to with 7nm filters in my 8 zone? With the 7nm filters, will I still see a marked difference between what I'm currently imaging with and the new camera and filters? Am I in a situation where I am just going to have to upgrade to 3nm? I'm sure I will have to eventually but I'd like to think that the 7nm will do for now.
Thanks for your patience with all the newbie questions.
J
WO Redcat 51 250mm f/4.9
Hi Jim,
The 7nm are fine, they'll work really well! Most of the nebulae images we have on our website were taken from Las Vegas with 7nm filters. We recently upgraded to 3nm, and yes we don't have to worry about halos anymore and the signal is slightly better, but we don't consider this to be a "crucial" upgrade.
A couple of examples taken with the basic 7nm filters from the city:
- https://www.galactic-hunter.com/post/ic1318-the-sadr-region
- https://www.galactic-hunter.com/post/ic-1396-the-elephant-s-trunk-nebula-from-the-backyard
And here is the halo difference on bright stars (ZWO 7nm OIII filter vs Chroma 3nm OIII filter).
As you can see, there is no halo at all with the 3nm filter which is awesome indeed!
Clear Skies,
Antoine