Trendy color powder runs can render pro lenses “financially not feasable to repair”

[DP]

Wouldn't a simple UV filter help keep the powder out (from the front elements, at least)? I sure wouldn't be changing lenses in the middle of all that!

[OWC Jamie]

Lenses aren't exactly hermetically sealed. If a zoom lens was you wouldn't be able to zoom as the required volume of air change wouldn't allow the lens to pump ( without a expensive and extensive pneumatics system).
There are too many levels/standards of weatherproofing.
Pros buy pro lenses and will spend the money to have them cleaned out after extreme use.
Or rent and return. :-)

[pRICE cUBE]

DP wrote:
Wouldn't a simple UV filter help keep the powder out (from the front elements, at least)? I sure wouldn't be changing lenses in the middle of all that!

Lenses are not airtight, they will suck in some air when zooming occurs. Some are worse than others. Even "wether resistant" lenses are not airtight.