Each their own... I go without a "protection" filter especially on wides where dew drops and dust on a dirty filter do their worst to degrade things.
Originally Posted by Poisson Du Jour
Filter are for collor-correction, polarizing, and B+W contrast augmentation... I stopped with the "skylights" in 1994.
My 150mm planar has been rained on more than once... I am happier keeping lens caps on lenses when not in use rather than dealing with micro scratched skylight filters which always seemed to degrade fast...perhaps because I let them get so dirty.
Anyway... I guess I'll just send this 16-35 in when and if I notice the blems are an issue. It is the most blemed up lens I have ever used... sad it was new 8 months ago.