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I use the Hutech LPS-V3 from a light polluted back yard in Adelaide. Seems to cut through the haze quite well and allows me up to 10 min subs @ 1600. I use it on a Tak 90 @ 4.5. I went to a dark site at Stockport but didn't use the filter at all which was the point of going to the dark site. Haven't tried the LPS2 though which is a lot milder.
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