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03-10-2019, 02:18 PM   #1
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Astrophotography Filters for Lenses

Hi everyone

I've just moved to a slightly more light polluted area and I'm going to invest in some screw on filters for general light pollution.

I know that clip in filters exist (and we are getting some for Pentax soon from STC Optics), but I'd rather go with something round that screws on. Ideally looking for 77mm+ sized because I'm happy to step up or use adaptors.

I'm UK based, so anything European is preferable over American suppliers - Does anyone have any personal recommendations? There are so many different things on the market that it's a little bit overwhelming - Especially when most places don't have comprehensive before and after photos!

03-10-2019, 03:02 PM   #2
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77mm astrophotography filters - Google Search
03-10-2019, 04:00 PM   #3
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QuoteOriginally posted by jlstrawman Quote

Yes, I'm aware of google searches. Hence my question for personal recommendations, as mentioned it's a little bit overwhelming with few reviews or technical break downs.
03-10-2019, 04:27 PM   #4
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QuoteOriginally posted by elephantswillforget Quote
Hi everyone

I've just moved to a slightly more light polluted area and I'm going to invest in some screw on filters for general light pollution.

I know that clip in filters exist (and we are getting some for Pentax soon from STC Optics), but I'd rather go with something round that screws on. Ideally looking for 77mm+ sized because I'm happy to step up or use adaptors.

I'm UK based, so anything European is preferable over American suppliers - Does anyone have any personal recommendations? There are so many different things on the market that it's a little bit overwhelming - Especially when most places don't have comprehensive before and after photos!
Hi
Hoya red enhancer filter is ok for reducing orange glow from sodium street lamps. I have tested this filter and it works. You can buy it on ebay.
Andrej

03-10-2019, 07:01 PM   #5
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I would suggest possibly posting in the astrophotography area. There are several there that are very active that reside in the EU, that are extremely knowledgeable.
03-11-2019, 08:18 AM - 1 Like   #6
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Welcome to PF first of all! The only recommendation I can give is contact High Point Scientific their staff is very good and helpful they can guide you in the right direction. A decant LP filter that size range from $40.00>200.00+ for 77mm us, won't hurt to email them they can help. You then could maybe find one in the UK or have them ship one out if shipping price is fair. You will what a filter that has good transmission in the A-Alpha,H-Alpha and O-III spectrum, helps in contrast with emission nebulae and other deep sky objects. You may what to watch Astrobackyard on Youtube his channel has helped me a great deal. Good luck and clear sky!
03-11-2019, 08:44 AM - 1 Like   #7
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Generally the recommended solution is to get the Hoya Red Enhancing filter as the poor man's light pollution filter. It has characteristics that are pretty close to those of expensive dedicated light pollution filters, but not quite as strong and not quite as narrow band. I got one a few months back and saw a dramatic improvement in what I was capturing in my excessively light polluted backyard (very bright bortle 8). I have wanted to use it more but haven't gotten clear nights when I could actually be out. Here is an article covering the Hoya filter when used for astrophotography.

03-11-2019, 11:53 AM   #8
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I would second the Hoya Red Enhancing- works pretty well and much cheaper then filters dedicated to reducing the sodium lamp influence.
03-24-2019, 03:44 AM   #9
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Hey everyone. Thanks for all the input - I spent a few days looking for a Hoya Red Enhancer in a large size, but I was hesitant because of the 120+ price. Fortunately, the first used one went up on ebay the day after, so I snapped it up and will be testing as soon as I'm graced with some clear skies.
04-01-2019, 10:55 AM   #10
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Enjoy. Bigger filters are expensive in general. I wish I could use mine more, but enjoy it the few times I have been able to make it out, hopefully I will be able to go out this weekend with it. I suggest shooting some object before it arrives and doing the processing, then once you get the filter shoot it again. Then you can see how much of a difference it makes for you. It really helped with my overly light polluted backyard.
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