I think I should try out prime lenses that I have now here for the cameras if there is a difference. But in general we need zoom lenses on all cameras when we film since we don't have much time to use per one video, safety things also dictate camera placement and with high speed cameras the changing resolution makes things also bit hard. I try to always stay over 2 aperture since I think under that picture comes out always bit soft.
The point i tried to make is not about Zoom lenses vs Prime Lenses. Its not like it would be a crime to use a Zoom Lens or something

If you need to use A Zoom that is fine.
What i Wanted to say is that there are a lot Better Options even for Zoom Lenses, and i was just curios if you ever tryed someting else than the "Kit Lens".
The 12,5-75mm kit lens is a pretty reasonable Preformer for the Price an Size of the Lens but is still a fairly low-End Lens qualitywise.
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If you must have Zoom then maybe check out Lenses Like the Sigma 18-35mm f/1.8 or the 50-100mm f/1.8. Also, maybe a 24-70mm f/2.8 and 70-200mm f/2.8. Those are realy good Lenses, there are a lot of different ones on the Market and you could get some older model (without Autofocus) for quite good price.
Keep in mind that you could pair all of those Lenses mentioned above with a speedbooster like a Nikon-F to MFT one. Those Lenses should give you an Optical performance very close to an Prime Lens.
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If you want to go with only one lens, then have a look into ENG Lenses , for example B4-Mount Those tend to have MASSIVE Zoom Range, sometimes up to 20x or even more, Aperture up to f/1.6 for the full Zoom Range and Built in Macro and can be found for high resolution Cameras. Sensor Size of the Chronos is perfect for those Lenses.
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If you could afford changing lenses more often, Prime Lenses are also a serious option, because you could get smaller and sometimes cheaper lenses which still perform very well.
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But most good stuff costs good Money...
If you just want to test out Lenses, then here a quick tip:
Visit a camera Store, pretend you want to buy something but want to test it bevore.
If you REALY like it, you could buy it, but you could always say you have to think about it and just leave without buying anything.
But get yourself a adapter for the Lenses you want to test BEVORE you go to test them, because the usualy dont have such adapters in the Stores!