jankap

I have done extensive testing with the (original) Metabones Speed Booster and a series of Nikon F (and compatible) lenses. There's lots to read at fujixtras.blogspot.com. 
 
Part of the 'improvement' in image quality (or, at least, the reduction of original imperfections from the adapted lens) is due to the reduction of the imaging circle: most optical abberrations get reduced through the same process. When using a top quality focal reducer, that largely compensates for the imperfections from the additional lens elements.
 
Having an adapter/focal reducer with electrical contacts at the body mount side does not bring any advances unless there's an equivalent provision at the lens mount side AND the adpted lens has electrical contacts/control AND the adapter offers is an appropriate translation between the respective control protocols. That's a lot to ask for. To my best knowledge, the only working case is with high-end Canon EF-S to Sony E-mount adapters.

That's why I'm puzzled by users who change camera systems like underware. Today Fuji, tomorrow Sony, then Olympus. I envy them, because it takes me months to fully understand one (!) system: the sensor, the DR expansion scheme, the autofocus system etc. Those guys must either be geniuses, or they have no clue what they are actually doing.
 
There are so many details that are worth knowing. For example: Fuji has the LMO, and other brands now offer something similar (and yet different), but what exactly is the LMO affecting? Trust me, it's about more than just reducing diffraction, as the LMO influences at least two more factors that Fuji isn't talking about.
 
That's why I'm glad that Fuji isn't introducing 3 new sensors every year, like Sony is doing. I'd have a hard time catching up. Keeping X-Trans II for 3 years helps me, as I find more time taking pictures instead of studying how the new sensor works and behaves when pushed to or over its limits. And where are those limits, anyway? We need to know, but it takes time to find out.
 
Make no mistake: These retro cameras may look "simple", but in reality, they are sophisticated "camera simulators", almost like a flight simulator. With the exception of the zoom ring, not a single button, dial or control is hard-wired, not even the on/off switch or the aperture ring. There's plenty of high-end computer magic happening under the hood, and some of it just isn't trivial. And since Fuji doesn't reveal much useful information about all this, we have to find out for ourselves.

Milandro, take it easy. You are one of the most active persons in this forum. You should already have got used to this kind of discussion.
If someone has a question like "Can I do A with my X" you can be sure there are replies like
- Why do you want to do A. Doing A is stupid. Do B.
- No one ever buys X to do A. You should have bought Y to do A.
- You can do C. It is not the same as A but C is great.
Another alltime favorite for is:
- I don't have the answer, but would be interested in the answer as well.
 
This is what we have to expect when we post. So just ignore it.