I am thinking of getting a 2inch Orion Ultrablock narrowband nebula filter for my 30XW.
I have heard that these filters don`t perform real well with large exit pupils.
Is this true???? My 30XW with my F5 scope produces a large-ish 6mm exit pupil.
Will it be of any benifit?
Is it worth the purchase for this EP?, it`s the only 2inch EP I own so it will get limited use.
If it works well and gives me a good contrast boost on nebulae, it will be worth the purchase even if I don`t use it too often. If it doesn`t do much it will be a waist of money.
I`m pretty sure there is an optimal exit pupil size range for various filters. Does anyone know this range for this filter?
I`m usually observing under moderate light pollution.
Any advice would be greatly appreciated.
Cheers.