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Old 19-09-2024, 10:25 PM
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Advice about filters for my new ASI-2600MC Duo

Dear IISer's,

I just got the ASI-2600MC Duo, along with M48 filter drawer (for 2 inch filters) and a kit of spacers. But I have not gotten any filters, yet. My scopes will be my 4inch Genesis and 5inch NP127is, on the AM5 with ASI-Air Plus. My backyard sky in Camberwell is Bortle 6. No opportunity to hook up the 2600 yet, and the weather here has been cloudy/wet.

My main question is regarding choice of a light pollution filter(s). My initial interests are the obvious ones eg. M42, Eta Carina, Trifid/Lagoon, but also star fields such as Omega and 47 Tucana globulars, Jewel box, Pleiades etc.

I was thinking initially about a Broadband filter such as the Optolong L-Pro, and just see how that goes, because the L-Pro will allow me to make a start on both nebulae and star-clusters. And from what I can tell from Youtube, the L-Pro seems pretty good and not that far behind many Narrowband filters.

But can someone enlighten me about the LED lights in Melbourne, I know I still see a lot of yellow/orange street lights (mercury/sodium I assume), but is LED lightning bad now as well ? If this is the case, then does this mean Broadband filters are becoming more useless, ie. the best way to get star clusters is to go outer-rural to Bortle 1, 2 or 3.

And if LED is getting bad in Melbourne, does that mean imaging from Camberwell I really should only be looking at Narrowband filters ie. L-Extreme, or L-Ultimate ?

Thx, Fox
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Old 19-09-2024, 10:40 PM
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Frak (!) this is a depressing memory. I remember pretty much 50 years ago, as a teenager, my first real scope was the Royal-LN4T 4" Newt from Astro-Optical in Bourke St mall. I could see swaths of Milky Way from my backyard in Mount Waverley, and make out the Ring Nebula in Lyra low in the Northern horizon, and impossible concept now...
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Old 20-09-2024, 08:20 AM
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Nikolas (Nik)
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Instead of the halo ridden Optolong L-extreme there are Antlia variants. Or use the optolong L-quad which is a great light pollution filter, better than the L-Pro. Only issue with the L-Ultimate is the narrow bandwidth which may or may not affect guiding with the Duo setup.
I image from my backyard in Glen Iris Bortle 6 with the L-Ultimate and the L-Quad and have great success. my scopes are in my bio
Hope that helps
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Old 20-09-2024, 06:03 PM
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Quote:
Originally Posted by Nikolas View Post
Instead of the halo ridden Optolong L-extreme there are Antlia variants. Or use the optolong L-quad which is a great light pollution filter, better than the L-Pro. Only issue with the L-Ultimate is the narrow bandwidth which may or may not affect guiding with the Duo setup.
I image from my backyard in Glen Iris Bortle 6 with the L-Ultimate and the L-Quad and have great success. my scopes are in my bio
Hope that helps
Thanks Nik,
Looks as though I live very close to where you are, are LED lights used a lot in the Boroondara area, Melbourne city, and are ever increasing ?
Fox

PS: given my location and your experience/advice, sounds like a good choice for me would be the L-Enhance Quad, plus either the L-Extreme or Ultimate.

Last edited by Fox; 21-09-2024 at 12:03 AM.
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