[Marios (Marios)]

The latest revision of the very popular IDAS Light Pollution Suppression (LPS) Filter comes as a 2" Round Mounted filter. HU-LPS-D1-48.
I offer this item in excellent condition free from scratches or blemishes on the optics. $180 pickup thats $50 off retail/shipping price from the USA. I will ship for an additional $10.

Description:
Now IDAS has tweaked the LPS-P2 to more optimize for one-shot color and modified DSLRs cameras. Please see the response curve in the images above.

The key concept on the LPS-D1 is to reduce the reddish background cast like HEUIB-II while blocking light pollution as much as it can. Although LPS-P2 is effectively blocking light pollution while retaining good color balance comparing with other brand filters, it was not as good as HEUIB-II at shown at following my test when color camera was used.

The LPS-D1 is the answer.

As the response curve indicates, LPS-D1 loses SII emission line while LPS-P2 didn’t. So this is why it's basically intended to be used with one-shot color cameras.

Manufacturer Product Number: LPS-D1-48