With 1/2000 and f/4 it's OK, and in my opinion the ISO could be lower. I have a 50mm f/1.8 and I can easily set the shutter to 1/4000, which is the highest. I usually get multiple shots from one shot, because I change the settings when I look at the photo on the display. I want to shoot a long exposure during the day, but I can't afford to buy an ND filter.
Great Shots as always
!DIY
That 1.8 brings in a lot of light, I believe mine is an f4. Thanks for your insight!