What filter to use for comet DSLR imaging with Moon present?

[Lester]

Hi all,

Just wondering what would be a good filter to use to enhance comets while the Moon is in the sky using DSLR camera? There may not be such a large filter on the market to cover camera lenses.

[Astroman]

Moon Filter :D

Seriously, I doubt there is any for a moon, could be wrong... a Lumicon swan filter should help seeing the comet though, not sure how it is affected by moon light though... I have heard of some OIII filters being used also... You could also try an LP filter. Problem is it will increase the exposure times also.