I am thinking of getting an OIII filter to help with looking at PN from in the suburbs. I have heard something about some filters not being good for imaging. Now, while I am looking at mainly using it for visual use and I was wondering whether the same filter could be used later for imaging.
I am looking at the GSO OIII filter due to price. Anyone know about the concerns of imaging and OIII filters?
Thanks!
1.25"
I already have the $60 needed for the GSO in the astro bank account... so if the GSO is fine I will buy it now. If not... you might get a PM! Thanks!
Having used and owning the Astronomik one, I can see its benefit in finding PN objects visually. The OIII filter I have is designed for CCD use, but still benefits visual quite well. There is no doubt that it does its job too, since everything appears blue!
Last edited by WingnutR32; 24-08-2011 at 11:19 AM.
Reason: Slightly reworded
Grant, we should nickname you PN Hunter.
You're going to be lethal on those pn's with the addition of a filter!
Can't wait for your reports in the obs reports forum!
Go get 'em, PNH !!
I am thinking of getting an OIII filter to help with looking at PN from in the suburbs. I have heard something about some filters not being good for imaging. Now, while I am looking at mainly using it for visual use and I was wondering whether the same filter could be used later for imaging.
I am looking at the GSO OIII filter due to price. Anyone know about the concerns of imaging and OIII filters?
Thanks!
Visually you are able to view some planetary nebulae very clearly with an Oiii from dark skies so it does make a big difference on some objects. In my experience imaging with an Oiii from the burbs requires a clear night and no moon. Unlike Ha or Sii, Oiii will suffer from LP and skyglow but it's better than nothing.
Planetary Nebula, emit strongly in OIII light so these filters help to make them stand out. I use a Bintel 1.25" OIII and it works really well for an inexpensive bit of kit, my most used accessory outside of eyepieces or dew heaters.
From what I understand, there are two types of OIII filters, broadband and narrowband. Can someone explain to me the difference? My understanding is that broadband is for visual and narrow band is for imaging. Can someone confirm?
Cheers,
Bo
from what I read, the band allowed with visual filters are broader than imaging ones as the visual ones allow IR as the eyes aren't sensitive to IR, but cameras are, hence the narrower band for imaging filters.
just what I read.
Grant, we should nickname you PN Hunter. 
