Hoya nx400 for solar imaging?

Started May 1, 2012 | Discussions thread
Phil Bishop Regular Member • Posts: 228
Re: Hoya nx400 for solar imaging?

I would not recommend any sort of ND filter unless it is capable of blocking infra red radiation, which is the real danger with solar imaging.
I would suggest getting hold of Baader film and making your own. See

I used to use Baader Film until I obtained more specialised equipment and found it to be very good, and a lot better than previous types of filter material.
Phil Bishop

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