Check the specs on the objective lens but I believe "82SV" alludes to the 82mm lens size. I bought a lens from Creedmoor when they had their special sale and it was a UV lens but a polarizing lens might also be useful.What is the filter size for a Kowa TSN-82SV?
Thanks!
Bonus question, the filter is to protect the lens, would a particular type of filter, UV, Skylight, etc. be useful? SW Ohio tends to be cloudy/overcast a lot compared to Arizona and Nevada.