MAGNETIC Freewell Filters
The Freewell magnetic filter system is a great convenience for those who change filters often, and unlike many other filter systems, even solves the lens cap problem!
The Alter Rapid Filter System (RFS & RFS+) provides a way to easily and safely move a filter out of the way temporarily while shooting.
The Freewell magnetic filter system is a great convenience for those who change filters often, and unlike many other filter systems, even solves the lens cap problem!
Annoyed at having to remove your ND, polarizer, or any other filter for just a few shots, only to replace it a moment later? Then you'll like the Alter RFS!