One way to solve this problem is to purchase an adapter to use the cheaper Canon lenses on a Fujifilm system.
Canon-Fujifilm adapters are different
The Fringer adapter is just one of the options, and it's not the cheapest one. A slightly more inexpensive option is VILTROX EF-FX1 adapter.
Moreover, there is both a conventional autofocus adapter and Viltrox speedbooster for Fujialmost eliminating the crop factor. The problem with it is that it also relieves you of autofocus, which is not at all interesting. Autofocus is declared there, but in fact it does not work normally.
Let's go back to Fringer EF-FX II adapter... I'll tell you why I chose it.
Why Fringer EF-FX II?
After conducting a thorough research of the adapter market, I was convinced that the best autofocus is preserved with the Fringer adapter. Its closest competitor Viltrox at the time of my research was frankly inferior in AF quality. Perhaps at the moment the situation has leveled off. You can find out only by purchasing both adapters and comparing them (which I am not planning to do). Both adapters are equipped with a micro-usb connector for firmware updates, with which the manufacturer adds support for new Canon lenses and fixes old bugs.
The Fringer EF-FX II adapter is available in two versions: EF-FX II and EF-FX PRO II... The “PRO” version for professionals features an aperture ring, just like the original Fujifilm optics. It's a matter of taste - whether to overpay for it or not. If you do a good search, you can also find the cheaper first Fringer EF-FX adapter without the II digit. But not worth it, it will work worse.
So how does the Fringer EF-FX II autofocus work with Canon lenses?
The results of their tests with the camera Fujifilm X T3 I have outlined in this video:
If you add up, then everything is fine for photography. Canon lenses that I tested can be safely used for photography on Fujifilm X-mount cameras.
But with video filming, not everything is so smooth. Tracking autofocus works well. I shot with confidence with the Canon EF 35mm f2 IS on a Fuji X-T3 and a gimbal. It monitors well and a good bundle comes out with the camera installed on the gimbal. There are problems if you want to shoot with eye focusing for extended periods of time. I have tried many times to shoot for your YouTube channel with Canon optics on Fujifilm cameras and I will say that the result is unpredictable. There were videos where the camera with the adapter worked with a bang and the focus remained on me. And there were where the focus crawled back and forth and went to the background.
From my experience, where autofocus with the Fringer adapter did not work at all, these are the Canon EF 24mm f2.8 IS USM and Canon EF 15-85 3.5-5.6 IS USM lenses. In general, on the website of the adapter manufacturer, there is a list of supported optics. Over time, this list grows. By the way, someone wrote to me that the Viltrox adapter supports EF 15-85 3.5-5.6 IS. Again, the Viltrox website also has a list of supported optics.
Conclusions: should you buy the Fringer EF-FX II adapter?
If you only need lenses for photography, then yes - you can. If for video filming, then it is worth considering who and how you will shoot. Such a combo is not suitable for shooting yourself, tk. focus on the eyes is unpredictable during prolonged work. If you act as an operator and shoot someone, not yourself, then you can use such an adapter, because you can correct its work at any time.
The main audience who are interested in such an adapter, I consider the owners of Canon optics, who want to adapt it to Fujifilm. Because buying a camera from scratch and relying on third-party lenses is not quite the correct formulation of the question.
I made sure that Viltrox lenses for Fujifilm they work excellently in autofocus and the AF quality sometimes even surpasses the native Fujifilm optics. Therefore, if you need a fast prime lens, then it is much more reasonable to buy Viltrox on the native Fujifilm X-mount, and not to play with Canon adapters and lenses. So, for example, I have already repeatedly conducted many hours of streams with a lens Viltrox 23mm f1.4 and tracking autofocus on the eyes did not fail. When working through an adapter, the performance of such a task is a big question.
In addition, Canon's full-frame lenses with an adapter make the camera bulky, heavy and unaesthetic. Therefore, I repeat, it makes sense if you already have such optics in stock and do not want to duplicate it by purchasing expensive Fujinon optics.
Where I see the point in the adapter - these are telephones. At Fujifilm, they look frankly losing in terms of price / quality ratio. Canon has some great lenses that Fujifilm can't match in price / quality, these are Canon EF 70-200 f4L IS и Canon EF 135mm f2L... Fuji's counterparts are significantly more expensive. By the way, the optical stabilizer works fine through the adapter. As a budget option from telephoto cameras, I recommend Canon EF-S 55-250 f4.5-5.6 IS STM.
Also read about autofocus adapter Viltrox EF-GFX (Canon optics in medium format).