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#1 mstrieber

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Posted 19 October 2020 - 04:36 PM

I have a few bucks to spend on a new filter and would like some recommendations.   I'm using an unmodded Canon 600D, William Optics ZenithStar 80mm, and I live in horrible Bortle 8 Las Vegas skies.  I have an Optolong UHC filter (clip in).  Would I be better off getting an IDAS v4, OIII, or some other variety of filter?   What would serve me best for shooting nebulas under my conditions?   Thanks.



#2 DLuders

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Posted 19 October 2020 - 04:44 PM

Have you read the Prairie Astronomy Club article, "Useful Filters For Viewing Deep-Sky Objects"?  



#3 mstrieber

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Posted 19 October 2020 - 06:16 PM

I've read a lot material but not that one.  I will, thanks.



#4 the Elf

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Posted 20 October 2020 - 02:33 PM

On the long term a mono camera and a set of Ha, O3 and S2 filters. Easier to use but less versatile an OSC astro camera and the Optolong L-extreme. If you want to continue using a DSLR I'd try to get a modded one with a more recent less noisy sensor like the 800D. If you want to keep the cost low modify your 600D first and try the filter you have. From measurement I made in an optics lab I'd say modding a 600D doubles the Ha sensitivity. That is not really a lot, just one f-stop. Given the low QE really think about a mono camera with a Sony backside illuminated sensor.

May I ask how much "a few bucks" is? Enough for a mono camera or enough for a mod?


Edited by the Elf, 20 October 2020 - 02:34 PM.



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