IDAS NB3 filter

[StuartT]

I ordered the IDAS NB3 filter to supplement the data I get on emission nebulae with my L Extreme (which doesn't pass Sii). But I've just been informed that IDAS have discontinued this filter.

If anyone has one to sell, let me know. Or if there is another Sii/Oiii filter perhaps you could suggest one?

Thanks

[StuartT]

update to this. Askar has now launched an equivalent filter which passes Oiii and Sii at 6nm bandpass width.

https://www.firstlightoptics.com/narrowband/askar-colour-magic-2-6nm-oiiisii-duo-band-d2-filter.html

I've ordered one, so I'll report back!