Front lens caps are nicely protecting your lens… until you accidentally scratch the front glass element by misplaced cap border in the photo bag. I also don’t like front caps for the extra time required to take them off.
Protective filters solves that concerns. However I often don’t like how the lens look with filter, and that it becomes slightly longer.
Here’s my eXperiment – embedding filter glass directly into the lens filter thread. I don’t use hoods/polarisers/ND/etc. so don’t need filter thread to be used for something else. It should work for any lens that has front element positioned deep enough to not touch the filter glass. And frame around front glass should be able to support the filter.
Fortunately, my favorite Mitakon 35mm F0.95 MK-II fits that criterias : ) And here is final result – pricy Sneider B+W XS-Pro UV glass sits firm and protects the lens from dust, dirt and scratches. It’s also easy to clean it.
Here's my short article on embedding lens filter
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