which leads me to the next (obvious) question
Is there any advantage for Still Photographers to use cine lenses?
The fact you can afford to buy cine lenses and do buy them to take Still Photography will satisfy an underlying mental need to compensate for other inadequacies you may have. Much the same as buying large white lenses will for some.
It's a stupid thread and a stupid question. Everybody else is trying to be nice and skirt round that fact.
Some people know the price of everything and the value of nothing. These are excellent high performing lenses for a very specific purpose. for a trained user they make life easier.
For an untrained amateur with deep pockets and a gnawing desire to have the best toys, most expensive toys in the playground, they will make your life harder.
This is a premise that we need to accept.... modern dslr technology can make the most rancidly untalented photographer turn out reasonable shots. So some think the more you spend the better the better your photography will be. And so the extension of that cod logic is that 'these cinema lenses must be the mutts nuts, and they will make my insipid flat boring anodyne inoffensive pictures slightly better'
They are the mutts nuts. But they aren't for you. Most of you.
I'm not saying don't hanker after, buy and enjoy using nice kit, just do a little research. This is like buying an f1 mclaren for a trip to the mall. There are better things for your needs. Most of you.
If you need to do a trumbone shot, you know, the raging bull shot, where you need shift the focal distance, focal length and perhaps shift the aperture slightly, all at the same time, without acutally touching the lens, and on a moving platform, where you know that the focus scale on the lens has been calibrated so that it matches your tape measure, so that you will hit the marks on your follow focus, so you know that the carefully worked out corelation between camera positions and lens movements won't be scuppered by unexpected 'breathing', so you know that having to bring your iris down a half a stop to counter-act the inverse square law as your camera moves towards your key-lit subject isn't going to click an aperture stop, is going to be visibly seamless and isn't going to affect your carefully set up focus marks then the money spent on hiring cinema lenses is good value.
If you just want more bifs, closer in at airshows, or just want the biggest great white because you can. You really should make the step up to cinema lenses.
And if you do, please please do come back and share your results. I'm sure you'll be given attendant reverence.