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

[swag72]

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?

[Demonperformer]

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

[swag72]

Thanks DP, appreciate you taking the time to answer.

[Demonperformer]

Sara

http://stargazerslounge.com/imaging-image-processing-help-techniques/129456-lrgbha.html is the thread I mentioned.