IDAS D2 Light Pollution Suppression Filter

IDAS D2 Light Pollution Suppression Filter

  (6 Reviews)
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About this product

Model:  hutech-idas-lps-d2-2
Part Number:  LPS-D2-48

New Japanese-made IDAS D2 LPS for astro photography with DSLR, colour and mono CCD cameras. 

Improves colour balance with colour cameras and also uniquely provides LED light pollution suppression.

Following from the highly successful IDAS P2 and D1 LPS filters, the D2 has been optimised for one-shot colour and modified DSLR cameras. The key concept of the D2 LPS is to reduce the reddish background cast whilst blocking as much light pollution as possible improving upon the already good colour balance of the P2 LPS and in addition block high/low sodium and white LED light pollution.

Light pollution suppression (LPS) filters are designed to suppress the common emission lines generated by artificial lighting, yet allow the important nebula emission lines to pass, thus enhancing the contrast of astronomical objects, particularly emission nebulae (see filter plots). 

Unlike other light pollution suppression filters, IDAS filters are specifically designed for balanced colour transmission using the IDAS unique Multi-Bandpass Technology (MBT) process. The balanced transmission allows colour photographs to be taken with minimal colour cast to broadband emission objects such as stars, galaxies and globular clusters.

IDAS LPS filters utilize the unique IDAS Ion Gun Assisted Deposition (IGAD) coating technology for superior coating durability (quartz hardness) and safer cleaning. IGAD coatings also improve temperature and humidity stability, reducing spectrum shifts down to +/-1nm from the +/-3 or 4nm shift of standard coatings. 

CCD imaging can also benefit, because although CCD imagers can already shoot through light pollution to some extent, including an LPS filter to the setup gives an added (signal-to-noise) edge. The filter also blocks infrared so a separate IR blocking filter is not needed.

Note, however, that light pollution suppression filters are not a perfect substitute for dark skies.

D2 LPS filters are initially available in 2" threaded cells and photographic filter size 52mm. 

Tranmission Graph

Customer reviews

Average Rating (6 Reviews):  
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Rating (max 5):  
Excellent light pollution filter
Thursday, 5 November 2020  | 

I recently bought the IDAS D2 Light Pollution Suppression filter and am using it on my 107mm APO refractor together with a Nikon D800 unmodified DSLR. The filter gives me excellent results under a Bortle 7 sky here in the suburbs of Stockholm. Highly recommended, but be prepared that you have to prolong your exposures per light with about a factor 3.

Rating (max 5):  
Who thought LED street lighting was a good idea?
Thursday, 20 August 2020  | 

I live in a central area of town where the lighting has been upgraded to LED. It's been this way for some time now and my old CLS clip filter was no longer up to the task with my dslr.
Having changed to a mono cooled camera LRGB was giving better results, but adding the IDAS D2 has improved my imaging beyond anything I was getting previously.
This filter isn't cheap, but worth every penny. If you want to image galaxies such as M101, M51, M63 etc from a town centre location, this filter works a treat.

Rating (max 5):  
Worth every penny
Monday, 10 February 2020  | 

Worth every penny in my poor old Bortle 8 skies. I also have a street light situated right behind my garden which actually partly illuminates my garden and makes anything in the eastern skies a no go. My exposures were whiting out at anything over 100 seconds previously but I got some nice 180 second exposures with the D2 with plenty of room left for more. Still not tried the forbidden eastern sky but I'm certain I'll have a bit more luck with this.

Rating (max 5):  
Led lps
Monday, 4 March 2019  | 

Our county is full led street lighting, finally decided to invest in an Idas D2 yes expensive but definitely worth the outlay , brown murky images now gone glad I got it now , if you hear reports of it causing halos , the cause for me was to uncheck hot pixels in the cosmetic tab in Deep sky stacker , halos now gone completely around stars . Definitely recommend as the push towards LED lights will increase .

Rating (max 5):  
Great for Bortle 7 skies with LED street lights!
Tuesday, 11 December 2018  | 

The city where I live changed to LED street lights (Sheffield), and I needed a new filter to help deal with a suburban sky and LED lights. Used this with my ZWO 294MC Pro and it is fantastic, very pleased. Expensive, but you get what you pay for.

Rating (max 5):  
Take that LED Streetlight !
Sunday, 7 October 2018  | 

Thought my imaging hoby was over when my streetlights were replaced with LED.
Any stretching of my stacked image ( Startools ) would bring out blue patches that could not be removed. Colour balancing was impossible. Bought this filter. Used it to image the heart nebula. Light pollution was easily wiped in processing. Colour balanced out perfectly. Better results than using my LPS filter with sodium vapour streetlights. Brilliant !


Please fill in the form below to ask a question.


Q1. What is the difference between the IDAS D1 filter and the P2 Filter? Which is best for a DSLR?

The only difference between the P2's and the D1's is that the newer D1's block a little more of the red, specifically the SII emission area. Whilst there's not usually much SII available it does help the overall colour balance of an image.

This effect is most useful on a DSLR - on a mono camera you'd be using other filters and we'd recommend a P2 filter. For DSLR's the D1's are more suited.

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