Quote:
Originally Posted by Emuhead
Any harm in going 3nm across the board? Is NII significant enough to make me want to buy a 5nm also? I've seen your photos Andy and am blown away.  . If I can get that kind of detail using just 3nm then that would save some dollars, but if 5nm has to be done, well I've come this far.. |
3nm are more expensive than 5nm which in turn are more expensive than 7 or 10 nm.
As Greg mentioned, 5nm ha also includes N2 signal. 3nm Ha excludes this so most serious narrowband imagers get 3nm O3 & 5nm Ha. The S2 can be either depending on your sky conditions.
Cheers
A