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IDAS NBZ filter

Optolong L-eXtreme Equipment Filters Duo-Narrowband
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Jérémie avatar
Jérémie avatar
Hi,

I have been looking without success about the bandwidth of the IDAS NBZ filter. Does anyone knows what are the width of each of the two narrowbands around Ha and Oiii emission lines ?

I would like to compare these to the 7nm bandwidth of the two narrowbands of the Optolong L-Extreme.

I suspect they are higher, given the claimed good performances in transmission power with fast f ratio scopes, but would like to get these figures…

Thanks
Well Written Engaging
Jérémie avatar
Jérémie avatar
Seems the bandwidth is around 15nm, a bit more, but didn’t find precise figures…
Bob Lockwood avatar
Bob Lockwood avatar
Not sure if this is what you are looking for. This is what I found for the wavelengh of each Ha and Olll lines.

Ha…656.28nm  There is no range

Olll…Primary 500.7nm  and  Secondary 495.9nm
Jérémie avatar
Jérémie avatar
Bob Lockwood:
Not sure if this is what you are looking for. This is what I found for the wavelengh of each Ha and Olll lines.

Ha…656.28nm  There is no range

Olll…Primary 500.7nm  and  Secondary 495.9nm

Thanks Bob. Indeed, these are the emissions lines around  which the filter has a non zero transmission band. I was looking for the width of the bands, centered around these emission lines. 

But I think I will go for the Optolong L Extreme filter that has very narrow bands (7nm wide) rather than this one. I don’t have a fast scope so I can use more selective filters for imaging in the Mordor of astrophotographers : big cities 😂
Well Written Respectful Engaging
Bob Lockwood avatar
Bob Lockwood avatar
Again, not sure if this helps. This is a chart I made when I was looking at different CCD chips and there QE. It shows each color wave and it’s overlap, in the blue and green which looks like it’s a total of about 10nm each side of Olll. 

David Redwine avatar
David Redwine avatar