Anyone here do not use a protective filter on their zeiss lens?

[KarlG]

Yes and no. If I am using my lenses somewhere a bit hostile to them like by the sea on a windy day with salt water spray in the air then yes I do. Otherwise no I don't as there is no need. As for protecting the front element of my lenses from accidental knocks, that is what lens hoods are for.

Same as this.

Generally, I don't use filters on any of my lenses. Not my RF lenses; not my Canon L primes (including the 85L, which has a ridiculously large front element).

Only exception is if I'm at the beach, as salt water is not my friend.

 

[Rogier]

Occasionally the IR filter when using it on the M8

 

[Luna]

Don't and haven't ever used a filter on my RF glass.
Personal preference and I'm a lazy. No profound reason why.

 

[toothless]

No filters for me.