Dual band filter for OSC?

Not sure what you mean by suppression for Oiii?

Regardless, I use the IDAN NBZ filter with my OSC camera. Wonderful filter.

Hi Tareq
I purchased the optolong L-ultimate and in my limited time testing it yesterday it works beautifully, no halos and it really picks up the narrowband signals.

Tareq Abdulla:
Hi,

Which dual band filter do you recommend for me to use for my OSC camera?

I want it to have two performances:

1. No halo at any star whole frame.

2. Suppression for OIII signal under Bortle 8/9.

Why would you want to supress Oiii signal?
I have the L Extreme and in general I love the results from it. However, it is prone to halos on v bright stars unfortunately

Not sure what you mean by suppression for Oiii?

Regardless, I use the IDAN NBZ filter with my OSC camera. Wonderful filter.

I mean that under light pollution of Bortle 8/9 OIII isn't good data mostly unless it is 3nm, i have Optolong OIII 6.5nm and Chroma OIII 3nm, no contest, that Optolong giving ugly OIII data even during new moon and away from light pollution dome, if i am lucky i might have good data sometimes, while with OIII 3nm i always have nice data good for processing, so i don't want to have that dual band where OIII is heavily affected even away from light pollution, Ha is always fine anywhere anytime.

Nick Axaris:
Hi Tareq
I purchased the optolong L-ultimate and in my limited time testing it yesterday it works beautifully, no halos and it really picks up the narrowband signals.

I was going to order it last month, but when i saw Shawn's video and later another video they stated that there are halos on small stars away from center, like to the right mainly and towards edges, so that i stopped.

Stuart Taylor:

Tareq Abdulla:
Hi,

Which dual band filter do you recommend for me to use for my OSC camera?

I want it to have two performances:

1. No halo at any star whole frame.

2. Suppression for OIII signal under Bortle 8/9.

Why would you want to supress Oiii signal?
I have the L Extreme and in general I love the results from it. However, it is prone to halos on v bright stars unfortunately

I already mentioned that i live under LP Bortle 8/9, i do have two OIII filters, one is 3nm and the other is 6.5nm, that 3nm is a super and GOD sent gift to us in LP, while that OIII 6.5nm i never been happy with data even if it is less LP around or away from LP dome and during new moon, i mean i can't accept 6.5nm while i have 3nm, so i don't want that dual band filter which gives me great Ha signal while bad OIII signal compared to my OIII 3nm, i do have 3 Ha filters, 3nm, 5nm and 7nm, those 5nm and 3nm are great while 6.5nm not much but not very bad, i don't take that 7nm over 5nm or 3nm at all, so with OSC color camera that will be even worse.

Tareq Abdulla:
Never

Your loss

Tareq Abdulla:
Hi,

Which dual band filter do you recommend for me to use for my OSC camera?

I want it to have two performances:

1. No halo at any star whole frame.

2. Suppression for OIII signal under Bortle 8/9.

I have experience with these 2 filters as well and a comparison on my profile for them here: https://www.astrobin.com/uz2syz/E/ In fact Tarek you and I had communicated during the comparisons. I have many examples on my profile so check them out. The filters are the IDAS NBZ 10nm, which @rgenier has mentioned in his post and the Antlia ALP_T filter 5nm mentioned by @Scott A. Both are excellent filters. The NBZ did give more halos around brighter stars but this is easily controlled in post processing. The ALP_T is just a phenomenal filter and with my 12” now is my goto filter and the NBZ is now for my wider field setup. There are 2 variations to this filter. The “standard” version is for imaging trains at f/4 and slower and the “high speed” version is good for imaging trains down to f2. I’m using the later version as my 12” newt is f5. Depending on how long your exposing for you can still get halos especially with larger insturments but it is substantially less then the NBZ. If your shooting with a smaller insturments you will have no problems.
Personally I don’t think you can go wrong with either but if your in bortle 8/9 and your mount can track out to 5-10 minute subs for fainter objects the ALP-T is the way to go. If you can get to around the 5min subs then I’d stick with NBZ. BTW I’m in Bortle 4 skies for reference.

As a side note, @Salvatore Iovene and his team has completely rebuilt the equipment database here on AB and you can post on its own dedicated forum where you can get questions asked by people that have the experience with a particular piece of equipment your interested in. I think this is an excellent modification to AB. Sorry didn’t mean to get off topic, just wanted to mention it is all.

Best of luck and let us know what you decide!

Dale

Dale Penkala:

Tareq Abdulla:
Hi,

Which dual band filter do you recommend for me to use for my OSC camera?

I want it to have two performances:

1. No halo at any star whole frame.

2. Suppression for OIII signal under Bortle 8/9.

I have experience with these 2 filters as well and a comparison on my profile for them here: https://www.astrobin.com/uz2syz/E/ In fact Tarek you and I had communicated during the comparisons.The filters are the IDAS NBZ 10nm, which @rgenier has mentioned in his post and the Antlia ALP_T filter 5nm mentioned by @Scott A. Both are excellent filters. The NBZ did give more halos around brighter stars but this is easily controlled in post processing. The ALP_T is just a phenomenal filter and with my 12” now is my goto filter and the NBZ is now for my wider field setup. There are 2 variations to this filter. The “standard” version is for imaging trains at f/4 and slower and the “high speed” version is good for imaging trains down to f2. I’m using the later version as my 12” newt is f5. Depending on how long your exposing for you can still get halos especially with larger insturments but it is substantially less then the NBZ. If your shooting with a smaller insturments you will have no problems.
Personally I don’t think you can go wrong with either but if your in bortle 8/9 and your mount can track out to 5-10 minute subs for fainter objects the ALP-T is the way to go. If you can get to around the 5min subs then I’d stick with NBZ. BTW I’m in Bortle 4 skies for reference.

As a side note, @Salvatore Iovene and his team has completely rebuilt the equipment database here on AB and you can post on its own dedicated forum where you can get questions asked by people that have the experience with a particular piece of equipment your interested in. I think this is an excellent modification to AB. Sorry didn’t mean to get off topic, just wanted to mention it is all.

Best of luck and let us know what you decide!

Dale

Hey Dale,

When i posted to your comparison it was like 3 months ago, that time not more filters came out, mainly that Optolong L-Ultimate the newer version, and Antlia ALP was like not confirmed to be the best as well, and then there is Askar came out with another one too, so it was like i have many options now and i have to choose one carefully, Askar mentioned they have zero halo but their filter is the most expensive compared to the other mentioned here, almost half price of that TRIAD quad band, so i wasn't sure to spend that much regardless what Askar/Sharpstar is saying.

I had another idea, which is getting one of those mainly L-Ultimate or NBZ then i remove stars, and for stars i just bring them back from RGB data either OSC camera or RGB filters, but that means either one more extra setup to buy expensive or use a filter wheel and i don't like waste nights with more filters to use, i prefer to shoot with 4 scopes/cameras and 4 filters than 2 scopes/cameras and 6 filters using a filter wheel, i always prefer to distribute time into more setup than squeeze it into one or two setup only, so i have two same cameras one is OSC and one is mono, i want to use that OSC with dual band filter, and SII with mono, i don't want to put SII and RGB with mono so each filter didn't get enough time per night.

Thank you very much about that equipment database, but i think you mean forum or groups? If groups then i joined some, if forum i think here is a forum where i posted my question already, but i will happily join if i know which one you mean.

Tareq Abdulla:

Dale Penkala:

Tareq Abdulla:
Hi,

Which dual band filter do you recommend for me to use for my OSC camera?

I want it to have two performances:

1. No halo at any star whole frame.

2. Suppression for OIII signal under Bortle 8/9.

I have experience with these 2 filters as well and a comparison on my profile for them here: https://www.astrobin.com/uz2syz/E/ In fact Tarek you and I had communicated during the comparisons.The filters are the IDAS NBZ 10nm, which @rgenier has mentioned in his post and the Antlia ALP_T filter 5nm mentioned by @Scott A. Both are excellent filters. The NBZ did give more halos around brighter stars but this is easily controlled in post processing. The ALP_T is just a phenomenal filter and with my 12” now is my goto filter and the NBZ is now for my wider field setup. There are 2 variations to this filter. The “standard” version is for imaging trains at f/4 and slower and the “high speed” version is good for imaging trains down to f2. I’m using the later version as my 12” newt is f5. Depending on how long your exposing for you can still get halos especially with larger insturments but it is substantially less then the NBZ. If your shooting with a smaller insturments you will have no problems.
Personally I don’t think you can go wrong with either but if your in bortle 8/9 and your mount can track out to 5-10 minute subs for fainter objects the ALP-T is the way to go. If you can get to around the 5min subs then I’d stick with NBZ. BTW I’m in Bortle 4 skies for reference.

As a side note, @Salvatore Iovene and his team has completely rebuilt the equipment database here on AB and you can post on its own dedicated forum where you can get questions asked by people that have the experience with a particular piece of equipment your interested in. I think this is an excellent modification to AB. Sorry didn’t mean to get off topic, just wanted to mention it is all.

Best of luck and let us know what you decide!

Dale

Hey Dale,

When i posted to your comparison it was like 3 months ago, that time not more filters came out, mainly that Optolong L-Ultimate the newer version, and Antlia ALP was like not confirmed to be the best as well, and then there is Askar came out with another one too, so it was like i have many options now and i have to choose one carefully, Askar mentioned they have zero halo but their filter is the most expensive compared to the other mentioned here, almost half price of that TRIAD quad band, so i wasn't sure to spend that much regardless what Askar/Sharpstar is saying.

I had another idea, which is getting one of those mainly L-Ultimate or NBZ then i remove stars, and for stars i just bring them back from RGB data either OSC camera or RGB filters, but that means either one more extra setup to buy expensive or use a filter wheel and i don't like waste nights with more filters to use, i prefer to shoot with 4 scopes/cameras and 4 filters than 2 scopes/cameras and 6 filters using a filter wheel, i always prefer to distribute time into more setup than squeeze it into one or two setup only, so i have two same cameras one is OSC and one is mono, i want to use that OSC with dual band filter, and SII with mono, i don't want to put SII and RGB with mono so each filter didn't get enough time per night.

Thank you very much about that equipment database, but i think you mean forum or groups? If groups then i joined some, if forum i think here is a forum where i posted my question already, but i will happily join if i know which one you mean.

Hello Tareq,
I have heard about the L-Ultimate and when I was looking into the ALP-T I heard rumors about that one, but after using it I can highly recommend it. Again this is just giving you feedback to your post.
I understand exactly what your trying to do with multiple rigs as to get the most imaging time with the little clear nights we all have! Congrats on so many rigs btw!
Your explanation on processing the stars in RGB is exactly what I’ve been doing to add the “little extra” to my images. In my case I don’t worry about the extra 20-30 minutes it takes to do what I want, but I know everyone’s time limits are different. You have to do what is best for you. This said I stand behind my post about the 2 filters I gave feedback on so if you get a different filter let us all know what your decision was and how it works for you! I’ll be interested in it as well!

@Salvatore Iovene can give you more info on this but in the database you can post to an item specific forum, not a group. @Salvatore Iovene can you explain this better for Tareq?

Dale

The Antlia ALP-T 5nm dual filter is far better than the L-eXtreme both in contrast and total lack of halos (I upgraded from the L-eXtreme to the Antlia at the start of this year).   The new L-Ultimate may have addressed the halo issue and at 3nm is the one I would choose for high light pollution areas as long as your scope is about f/4 and above.

Scott A:

Tareq Abdulla:

I can vouch for the ALP-T as well. Having just gotten into astro I've had some good results with it and more to come once I up the integration time.

Which Bortle sky you under?

If i was under Bortle 4/5 or even 6 i could think about this ALP-T one, but under Bortle 8/9 i want 3nm mainly and not 7nm or 5nm.

I use it under Bortle 7 skies.

Then i will ask you politely to move to Bortle 10 with LED lights and give it a try