Most, if not all, lenses are not at their optimal sharpness wide open... plus as the aperture is wider, the DOF is shallower, so onlycertain portion of the over image is in focus, others are off focus.
So it also depend on where you are focusing on.
Most lenses are not as sharp wide open and will have less contrast too.
The area around 'PEN' looks sharp enough, remember that you are dealing which very shallow DOF too, so not all the letters can be as sharp.
Use a hood to get minimize loss of contrast (Note : this is not a cure-all, just to maximize what is possible)
Photos look under exposed to me and the environment maybe too dark for you to properly manual focus. Maybe you can try repeating the whole "experiment" again with sufficient light and with a stable tripod.
doesn't look like handshake to me, the fonts are sharp... this looks more like ghosting/ lack of contrast at wide aperture which is pretty normal for most large aperture lenses.
Fujifilm X-Pro1 | XF 14, 18, 35, 56, 60, 55-200 | EF-X20 speedlite
The first sample is normal, at f1.7 DOF is super shallow anyway, at least the part u're focusing on is still sharp.
The second sample at f1.7 is a too hazy...looks like ghosting but there is no direct light source. Not sure why.
Hey.. thanks everyone for the help... after playing around with the lens today, i found that F1.7 would focus on a really small point. F2.8 onwards would have a shallower DOF. Having fun with the lens now..
IMGP0443 by Li Shixian, on Flickr
IMGP0429 by Li Shixian, on Flickr
IMGP0430 by Li Shixian, on Flickr