Kolari Vision have been busy. They have introduced a behind-the-lens clip-in system for filtering which allows you to swap filters directly in front of the sensor. This is especially useful for lenses which don't allow you to put a fiter in front of the lens, such as fish-eyes. Of course some lenses have special filter slots built-in but these are inherently restricted.
I had wondered whether a full-spectrum converted mirrorless camera would revert to conventional visible light work by putting an infrared-blocking filter (aka 'hot mirror') in front of the sensor/lens. After all, unlike an SLR, the exposure sensing is done from the main sensor, not from a separate system, so it will still function as normal if the 'hot mirror' has the same characteristic as the original.
It turns out that Kolari have come to the same conclusion. If you have a mirrorless camera converted for full-spectrum photography, such as a Nikon Z series, you can then add a suitable 'hot mirror' flter in front of the sensor simply by clicking it into the Kolari magnetic filter system. In that case, your camera is 'conventional' again.
One important thing to bear in mind is that if you buy a new camera and have it converted (by any facility, not just Kolari) you will probably invalidate the original warranty. So best to wait a bit.
So, two links to explore: Kolari's clip-in filters and hot mirror replacement (here as an external filter).
And while you're there, Kolari have a fascinating article about the dreaded infrared hotspots, which answers quite a few questions!
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