Still a great photo to treasure, now and long after he is gone.
Be sure to take more of those where you can compose, spend time with him, make sure you have no regrets about that after he is no longer with you.
My dad was my best friend, passed in 1987, and I still miss him like krazy. He was always happy to tag along with me wherever I went, but at the time I had a corporate "IT" job that never seemed to give me the free time I needed for him or anyone else. I was on call 24 x 7, always took more than 8-10 hours a day, never got overtime, never seemed to be able to take the "comp time". They called it a salaried / managament position.
Haven't had a "j-o-b" (hate that word) with an employer and a paycheck since 1996.
Many of us seem to learn way too late how cool dads and grandads really are.
Be well...