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Luminance Filter Instead of UV/IR Cut

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#1 kel123

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Posted 13 April 2021 - 08:24 PM

I have a luminance filter from the ZWO premium LRGB set. I was wondering if I should use it on my Asi533MC for broadband imaging instead of getting a new IR/UV filter.

It sure cuts IR, atleast according to ZWO but what about UV? Is there something I am missing?.

Meanwhile, I also have a GSO IR (only) blocking filter. Which of them is more ideal to use or would a dedicated IR/UV cut filter make more difference because of the UV line ?

Since I got my Asi533MC, I have concentrated on narrowband imaging. I have seen a lot of red....and some blue. It is begging for photons from galaxies and star clusters

Thanks.

#2 sdbodin

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Posted 13 April 2021 - 08:39 PM

That is what I use for my Asi1600MC-cool, a standard Lum filter for mono imaging that I had laying around, works perfect.



#3 xiando

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Posted 13 April 2021 - 09:01 PM

Unfortunately I don't have access to all the graphs I used to have in order to check directly, (they're on a computer I can't access right now due to a bad mother board) , but isn't a luminance filter a UV/IR cut filter? (ie, aren't they both generally tasked with filtering out wavelengths below ~450(ish) nm and above ~700nm?


Edited by xiando, 13 April 2021 - 09:03 PM.


#4 kel123

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Posted 13 April 2021 - 09:12 PM

That is what I use for my Asi1600MC-cool, a standard Lum filter for mono imaging that I had laying around, works perfect.


Great to know this. Thanks

#5 kel123

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Posted 13 April 2021 - 09:16 PM

Unfortunately I don't have access to all the graphs I used to have in order to check directly, (they're on a computer I can't access right now due to a bad mother board) , but isn't a luminance filter a UV/IR cut filter? (ie, aren't they both generally tasked with filtering out wavelengths below ~450(ish) nm and above ~700nm?


Most times luminance filters are mentioned, it is mostly about cutting IR. I haven't heard much about cutting UV about them that I wonder. Or perhaps it is just oversight. I cannot find the graph of the one I have.


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