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H-alpha night sky filter any use?

Ratlet

By Ratlet
in Getting Started With Imaging

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Ratlet

Ratlet

Posted
Posted

I picked up a bit of gear recently and there were some oddities in the box including a BST h-alpha night sky filter.

Near as I can tell it's for black and white film and filters out everything below 640nm and allows the h-alpha and IR light through, although I'm not completely certain.

Is this likely to be useful with a CMOS osc camera?  My Hypercam has an inbuilt uv/it cut filter which will cut frequencies longer than 690nm so I guess it would function is a broad h-alpha?

 

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