Originally posted by waterfall This is like saying because it rains, umbrellas are only recommended for those who do not have rain gear. We shoot photos in bad weather. So we choose only WR or AW lenses for those days. All we are advocating is weather protection for our favorite lenses. I do not change lens in rainy or snowy weather outdoors. Suggesting that fast prime lens changes are normal, or necessary, is not to the point of the thread.
Earlier in the thread I tried pointing out that I think Pentax should make all lenses WR, because - besides the obvious advantage to customers - I don't think it puts Pentax at a cost disadvantage to competitors, who need to pay for in-lens SR.
Although I have only non-WR zooms, I do change them frequently in the rain/snow. Unless you carry a half-dozen or more bodies with your primes, I can't imagine how you can avoid changing your prime lenses in the rain/snow (or good weather for that matter) even more frequently than I change between my 10-20, 17-50, and 55-300. I base that partly on my prior film life with 17, 28, 35, 50, 135, and 200mm lenses (I desperately needed at least three more primes, obviously.) I do think that someone with an unlimited choice of WR primes and zooms would still mostly choose the zooms for severe weather, where the zooms might reduce the frequency of exposing the innards of the cameras/lenses to the elements.