Although many filters are no longer required with digital photography, thanks to the power of applications like Lightroom, Capture One and Luminar, there are some that can still be very useful. Particularly neutral density filters. But filters that go onto the end of your lens can be a pain, especially when it comes to keeping them clean.
California-based Aurora, though, has developed a drop-in filter solution for mirrorless camera lens adapters that not only keeps the filter clean and protected but also means you don’t have to swap it out when changing lenses. They kicked off recently on Kickstarter, and have already more than doubled their goal.