What is a good light pollution filter?

[gregbradley]

I am thinking of putting a light pollution filter in front of my Proline camera to help with some of the gradients I have been getting.

Any suggestions about which one is best?

The light pollution is mild.

Greg.

[g__day (Matthew)]

I use Hutech - because they don't shift the RGB palette. I note of the main contenders - some cut Sodium, Neon and Mecury based lamps glow more - but they shift colours in unusual ways.

So if you want colour fidelity - consider the Hutech IDAS filter.

Matt

[gregbradley]

Thanks Matt.

Hutech have been pumping out good products for some time now.

I wonder how I attach it, hopefully it will screw into the face of the camera.

Cheers,

Greg.

[leon]

Definitely Hutech expensive I know but worth every cent.

Leon

[Astroman (Andrew Wall)]

I agree Hutech IDAS LP filter, works great!

Not sure it will help with the gradients but sure will make it easier to take longer exposures in light pollution.

[gregbradley]

Thanks Leon and Andrew.

It should help with the gradients as the example shows on their website of with and without the filter and an SBIG ST8XE showed quite a bit more contrast.

Thanks for the advice guys. It seems there's a consensus here about the Hutech IDAS filter.

Greg.

[rat156]

Hi Greg,

I'll add my voice to those above, buy it direct from Hutech, they're really nice. I've had a 2" and now have the 1.25" as I changed where the filter goes in the imaging setup (now behind the pickoff mirror for the autoguider).

Worth every cent, probably a few more actually.

Cheers
Stuart

[gregbradley]

Thanks Stuart. They sound like just the right thing for my system.

I also masked off some bright blue LED lights on the Paramount mount and that made the observatory significantly darker and I noticed a difference in some subs I took. So its very "local" light pollution as well!

Greg.