Meanwhile I was able to finish my review on the 85mm f1.4...
After first mixed feelings: I am pretty excited about the lens. In terms of the results you get from this lens: it is just wow!!! Very decent images, excellent image quality - if you know how to use the lens.
For whom is this lens for?
It is made for owners of the R-Mount cameras - but the EF version will show similar results.
When to take the RF Mount version instead of the EF mount? This is a very good question. For my taste: if you have decided to got with the R-Mount and/or you do discontinue with EF Mount: go for it. It is lighter and easier to handle.
It is more a lens for enthusiasts, for people who like to shoot manual focus
But manual focus is so much fun to use on the Canon mirrorless cameras....
But the lens has a bit of weaknesses too:
It is not native RF: I guess a lens designed for the 54mm bajonett diameter and the short flange distance can be even smaller and lighter
It is not weather sealed
I miss an EXIF chip - this would be even better
And the 1.1m minimum focal distance is a sad thin: I would prefer it mach shorter, even shorter than the usual 85 mm...
I give the lens a highly recommended!!!
For more information please look at my review here
https://delightphoto.zenfolio.com/blog/2019/3/samyang-s-new-lenses-for-rf-mount-the-mf-85mm-f1-4