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Filters for imaging - 6nm Ha or 12nm Ha?


swag72
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I am looking at getting a narrowband Ha filter. It will be an Astronomik Eos clip filter and they are available in either 12nm or 6nm. I know that the 6nm is almost double the price of the 12nm, but am happy to stretch to that if I feel it's worth the extra.

I'm not really sure whether I'd see the benefits of the 6nm over the 12nm. I am eventually looking at also getting a OIII or UHC as well.

So can any one suggest which would be better and why?

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Sara

I had a similar discussion on a previous thread and was advised to go for a narrower one rather than a wider one on the grounds that a wider one does not let in any more Ha, just more noise from the wavelengths around it ... at least, I'm pretty sure that was the point.

HTH

Edited by Demonperformer
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