Quote:
Originally Posted by gregbradley
The 5nm is a good performer. I have been using them for several years now. The 3nm can show a bit more detail but it takes a lot more exposure time so no free lunches.
Greg.
|
I haven't tested myself but according to the Astrodon site the 3nm should transmit the same amount of light at the target wavelength as the 5nm filters. So exposure times should be about the same. Obviously this doesn't apply to the 3nm Ha as it misses out on a significant amount of NII light which the 5nm doesn't.