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QHY Narrowband Filters

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#1 natwin

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Posted 17 April 2021 - 12:51 PM

I noticed recently that various retailer are packaging the QHY600M with QHY branded filters, including 3.5nm narrowband. These are 50mm round filters and would be a good price as part of a package deal. There's nothing on the QHY site that has information about these filters. Does anyone have any experience with them, or know where there some information on the web?



#2 leviathan

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Posted 17 April 2021 - 01:21 PM

It's Antlia, not QHY.



#3 my-spot

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Posted 17 April 2021 - 03:14 PM

I have some 36mm QHY branded Ha Sii Oiii filters I got 5 or 6 years ago. They are only 12nm and had acceptable performance. Interestingly, each one came with an individually generated transmission graph.



#4 natwin

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Posted 19 April 2021 - 11:39 AM

It's Antlia, not QHY.

That's interesting, because the package deals offered by various retailers make no mention of Antlia filters. But I checked and 3.5nm narrow band filters were indeed made by Antlia, but are now discontinued. So perhaps retailers found a way to sell the remaining stock of the discontinued product.

 

All this begs the question: How do they perform? Anyone have any experience with Antlia 3.5nm narrow band filters? Spectral response? Reflections and halos?



#5 leviathan

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Posted 19 April 2021 - 10:26 PM

Just search for "Antlia" in this sub-forum, there are plenty of topics and results.



#6 natwin

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Posted 22 April 2021 - 08:15 PM

Yup, tracked them down and read enough to get a good idea. Thanks




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