Light pollution filter - which way is better? - Forums

Topic starter

Apr 10, 2018

Hello to anyone who would have an opinion..
I am wanting to buy an Astronomik light pollution filter for use with a CCD refractor and CCD SCT LRGB setup. Should I get one to replace my L filter when shooting or should I get one to go forward of the filter wheel somewhere? I am leaning toward getting one to go in front of the filter wheel in the optic train somewhere..
thx
Charles

John

Apr 10, 2018

i use a Lumicon UHc..its very good. with heavy polution..narrowband filters will work better

Sara Wager

Apr 10, 2018

I use a Chroma LP filter as my luminance in one of the rigs and the other uses a HUTEC IDAS, again as the luminance filter only. I thought long and hard about this and if I'd put the LP filter in the front of the imaging train then it may have had an adverse effect on my Narrown band data collection. I'm happy how it works

Charles Harris

Topic starter

Apr 10, 2018

Hello Ms. Wager,
…I love your artistic interpretations of the heavens..I was quite surprised to get to chat with you for a moment in time.. thanks for the guidance. I will consider it gospel.
Charles

Respectful Supportive

Charles Harris

Topic starter

Apr 10, 2018

John:
i use a Lumicon UHc..its very good. with heavy polution..narrowband filters will work better

Hello John,
I see the difference in some of the same shots you have taken that I have taken. My pollution is not bad, but I think it is probably borderline. I guess I am probably considering getting a substitute for the Lum filter at this point unless anyone responds with convincing info to the alternative. Thanks for the advice.
Charles

Vittorio

Apr 11, 2018

Hi Charles,
unfortunately I think that you can't have definitive answer to your question. A lot of people use an LP filter between filterwheel and telescope, others use an LP filter just on filterwheel (in place of L filter), other people don't use LP filter.
I know just one thing: everyone has problems!
personally I use an Idas P2 in place of L filter. some friend use Idas between telescope and OAG (so they can have LP reduction on RGB filters) but a lot of thimes they have reflection problems.
Sorry for my english :-)

John

Apr 11, 2018

Charles Harris:
Chroma LP filter

the most of the pictures where done with a different camera...now i have a asi1600mm-c and use the uhc filter...only when i capture mid horizon targets. for zenith..i use the zwo clear glass...im living in a almost dark zone.soo...

Charles Harris

Topic starter

Apr 11, 2018

I see..thx.

Charles Harris

Topic starter

Apr 12, 2018

Vittorio:
Hi Charles,
unfortunately I think that you can't have definitive answer to your question. A lot of people use an LP filter between filterwheel and telescope, others use an LP filter just on filterwheel (in place of L filter), other people don't use LP filter.
I know just one thing: everyone has problems!
personally I use an Idas P2 in place of L filter. some friend use Idas between telescope and OAG (so they can have LP reduction on RGB filters) but a lot of thimes they have reflection problems.
Sorry for my english :-)

Thank you Vittorio. Very clearly put and valuable to know, I'm sure. I will try to remember this as I get closer to a decision..I am going to check out all these filters you guys have told me about..
So long,
Charles

Mark Hudson

Apr 24, 2018

Sorry it's a late reply, I use the Hutech IDAS in front of the filter wheel when imaging in LRGB and get good results with it under poor skies. I usually remove the IDAS for Narrowband imaging. For info the LRGB and Narrowband filters are all Astronomik brand.

Good luck with the decision.

Mark

Helpful

Charles Harris

Topic starter

Apr 25, 2018

Thank you very much Mark..

Peter Juhlin

Apr 26, 2018

Im always shoot half of subs with uhc astronomik and half without any filter (ir- and LP removed)

Gothenburg city, light pollution-grade 6-7

Best regards, Peter