Please see lens condition in the picture below. Please see some imperfection on the cosmetic part of the lens. Note that the optics is clean. See sample images taken with an XT2
The speed booster is a focal reducer that makes 85mm true 85mm on an apsc sized sensor.
Samyang lens is a cine version. Meaning it has clickless aperture for more control on ur aperture setting also the focusing is much more precise due to the longer focus throw... Meaning u twist it farther than the usual to have more finer degree of focus.
Rfs. Meron nang fujinon 90mm f2. Preferring autofocus native fujinon glass. But sharpness wise at the center area ng samyang is top notch...