ICEINSPACE
Moon Phase
CURRENT MOON
Waning Gibbous 86.5%
|
|
29-08-2013, 01:56 PM
|
|
Moderator
|
|
Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
Posts: 33,160
|
|
Filters
Looking at the world of imaging filters it’s an eye opener for such a narrow view of the world. While looking into the world of mono, it struck me what do I get?
I will be upfront and say if you were looking at getting a complete filter set on a budget what would you choose – let’s say you had a 10 spot filter wheel? What would you fill it with?
|
29-08-2013, 04:12 PM
|
|
ze frogginator
|
|
Join Date: Oct 2007
Location: Sydney
Posts: 22,062
|
|
Baader Ha, Oiii, Nii, Sii, IR, Lum, Red, Green, Blue, UV/IR block.
|
29-08-2013, 04:56 PM
|
|
Country living & viewing
|
|
Join Date: Mar 2006
Location: Armidale
Posts: 2,789
|
|
What do you want to image?
I have L R G B Ha B V R I
I'm not interested in narrow band as I have no light pollution. I do like photometry though hence the photometry filters.
|
29-08-2013, 05:04 PM
|
|
Narrowfield rules!
|
|
Join Date: Nov 2006
Location: Torquay
Posts: 5,064
|
|
Quote:
Originally Posted by multiweb
Baader Ha, Oiii, Nii, Sii, IR, Lum, Red, Green, Blue, UV/IR block.
|
Ditto, good choice.........except Astrodon
|
29-08-2013, 08:26 PM
|
|
Moderator
|
|
Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
Posts: 33,160
|
|
so what is NII used for?
|
29-08-2013, 08:53 PM
|
|
PI cult recruiter
|
|
Join Date: Apr 2010
Location: Brisbane
Posts: 10,584
|
|
Sorry, Andrew. It's usually me that's too late
|
29-08-2013, 10:40 PM
|
|
Registered User
|
|
Join Date: Feb 2006
Location: Sydney
Posts: 17,903
|
|
I used both Baader, Astronomiks and Astrodon (Gen 1 and Gen 2).
I prefer the Astrodons as they are easier to get balanced colour and quite parfocal (within reason).
Baaders are quite good and have very good red response, are less parfocal despite the claim and I had a 7nm Ha filter which was defective. I have some Astronomiks and they have good colour balance, are cheaper, thinner (they need spacers to fit in filter wheels) and I found they gave good star colours.
So any of those 3, I think are good. Astronomiks are the cheapest I think. Mike S uses Astronomiks.
You can get great results from any of them. Astronomiks are the cheapest.
Greg.
|
30-08-2013, 07:04 AM
|
|
Registered User
|
|
Join Date: Jan 2011
Location: Rylstone, NSW, Australia
Posts: 1,398
|
|
Well, I'm just going through this exercise myself and I'm going with Baader as a compromise.
First, I think the lum filter Baader offers is IR blocking (which in my case is essential for a refractor). The narrow band filters also seem to be a compromise in bandwidth compared to Astronomiks (wide) and Astrodon (quite narrow), and price wise fall into a somewhat middle ground which also makes sense. It didn't hurt that there are some beautiful test photos using a TEC140 with Baader either.)
But, my main reason for going this way over Astronomik is the slight notch between Red/Green to deal with Sodium light pollution which the Astronomik's don't have. The Astrodon filters have this notch (larger!) as well but cost much more. I plan to try either a Hutech or Astronimik CLS light Pollution filter in place of the luminance filter. This combination of filters might provide a reasonable light pollution combination but does not address Mercury LP...
I have tentatively compared both Hutech and Astronomik LP filters using a light box...perhaps not a fair way to compare. Compared to using no filter at all the Hutech takes 2X the exposure length to reach the same adu, the CLS 3.4X (big surprise!)
Peter
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT +10. The time is now 02:44 AM.
|
|